MIGRATORY BIRDS OF COLORADO


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State Overview

(1)  A state-level overview of where the migratory birds that breed in Colorado are found during the non-breeding season based on Shared Stewardship Connection Maps.

(2)  An overview of Colorado's Focal Migratory Species. This includes:

  1.    Conservation status
  2.    Multi-species connection map that shows connections for focal species based on tagging data of individual birds

(3)  Focal Species Accounts that provide detailed information on Colorado's focal species. This includes:

  1.    Conservation statistics and information about current Southern Wings projects
  2.    Species Connection Maps that show connections across the annual cycle for each species based on tagging data of individual birds
  3.    Conservation challenges
  4.    Links to additional resources

(4)  Partner organizations working in countries connected to Colorado.

(5)  Additional resources
 

Shared Stewardship Connections

These maps show where 68 migratory species that breed in Colorado are concentrated during the nonbreeding season using year-round distribution models from eBird Status and Trends. They highlight opportunities for conservation across the full annual cycle of birds by informing locations for joint stewardship actions. Shared stewardship, on the left, represents the strength of connection between Colorado and the nonbreeding distributions of Colorado's migratory birds. Shared stewardship uniqueness, on the right, shows this information relative to all 50 states, emphasizing the hotspots where Colorado has unique connections compared to other states. The values in each 3 x 3 km pixel combine information on the number of species, the nonbreeding abundances of those species, and the percent of each species’ breeding population in Colorado.

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Shared stewardship connections highlight key areas where Colorado's migratory species are concentrated during the nonbreeding season. Darker colors represent areas with stronger connections across all 68 species. Data source: Cornell Lab of Ornithology. ​​​​​Download map. 

 

Uniqueness maps show where Colorado has distinct shared stewardship connections compared to other U.S. states. Darker colors represent areas where Colorado has a high proportion of stewardship connections relative to other states, highlighting unique opportunities to make a difference. Data source: Cornell Lab of Ornithology.  Download map. 

How were these maps created?

These maps used modeled information on the relative abundance and percent of population of bird species from eBird Status and Trends. Shared Stewardship maps are weighted sums of species’ nonbreeding populations at 3 x 3 km resolution, with the percentage of a species’ breeding population in Colorado state as the weight. Thus, if a species has a higher percent breeding population in a state, its nonbreeding map will contribute more to that state’s shared stewardship. Shared stewardship uniqueness maps show these values relative to the total connections across all 50 U.S.A. states by calculating the proportion of the total connection strength attributed to Colorado in each pixel. For more information visit FAQs and eBird’s portal for state-level summaries.

Focal Migratory Species

We have compiled a list of 21 Neotropical migratory species that breed in Colorado and have been identified as focal migratory species across multiple groups and initiatives. For more information about how this list was created,  please see the section below "How was this table created?" By broadening the scope of this list beyond the Species of Greatest Conservation Need (SGCN), our intention was to create a resource that accounts for changes in SGCN associated with updated State Wildlife Action Plans (SWAPs) and provides a resource that has applications beyond updating SWAPs. We anticipate this list to update over time as SGCNs and other groups and initiatives revise their species lists.

 

Tax. order Common name Scientific name SGCN BCC R2R % breeding pop. Focal
 5900 Mountain Plover Anarhynchus montanus yes Continental Concern red 36.31 yes
 32144 Thick-billed Longspur Rhynchophanes mccownii yes Continental Concern red 3.12 yes
 32142 Chestnut-collared Longspur Calcarius ornatus yes Continental Concern red 0.31  -
 3805 Black Swift Cypseloides niger yes Continental Concern orange 0.57 yes
 5807 Piping Plover Charadrius melodus yes  - orange 0.38  -
 33040 Bobolink Dolichonyx oryzivorus yes Continental Concern orange 0.02  -
 4798 Rufous Hummingbird Selasphorus rufus yes Continental Concern orange 0  -
 5690 Whooping Crane Grus americana yes  - orange  -  -
 6638 Least Tern Sternula antillarum yes Continental Concern orange  -  -
 32678 Sagebrush Sparrow Artemisiospiza nevadensis no  - yellow 2.44  -
 16581 Olive-sided Flycatcher Contopus cooperi yes Continental Concern yellow 1.39 yes
 4809 Broad-tailed Hummingbird Selasphorus platycercus no Continental Concern  - 38.71 yes
 33459 Virginia's Warbler Leiothlypis virginiae yes Continental Concern  - 29.87 yes
 32503 Lark Bunting Calamospiza melanocorys yes Regional Concern  - 17.15 yes
 32406 Cassin's Sparrow Peucaea cassinii yes Regional Concern  - 10.41 yes
 18850 Gray Vireo Vireo vicinior yes  -  - 7.28 yes
 8593 Flammulated Owl Psiloscops flammeolus yes Continental Concern  - 7.01 yes
 8308 Swainson's Hawk Buteo swainsoni yes  -  - 6.79 yes
 32478 Brewer's Sparrow Spizella breweri yes  -  - 4.85 yes
 16643 Willow Flycatcher Empidonax traillii yes  -  - 0.39 yes
 3230 Yellow-billed Cuckoo Coccyzus americanus yes Regional Concern  - 0.08 yes
 
For each species, we include the following information in the table:
  • SGCN: Whether it is listed in Colorado's 2015 Wildlife Action Plan (yes or no).
  • BCC: Whether and where it is a Regional SGCN (region or blank).
  • R2R: Whether it is a Road to Recovery Tipping Point Species and on which Alert List (Red, Orange or Yellow).
  • % breeding pop:  The estimated percent of the species’ global population breeding in Colorado (source: eBird state-level data). Data are only shown for modeled species.
  • Focal Account: Do we provide a focal species account (yes or no).
Download full table.
For additional conservation statistics for each species, please visit the Comprehensive Table of State Birds on e-Bird's portal and download the species-level summaries.

 

How were these tables created?

We determined the list of focal migratory species for the state based on whether they satisfied any of the following criteria, specifically species were listed as:


The complete table for download includes the following information for each species:

  • SWAP: Whether it is listed in the state’s Wildlife Action Plan (yes or no),
  • RSGCN: Whether and where it is a Regional SGCN (region or NA)
  • BCC_status: Whether and where it is a USFWS 2021 Bird of Conservation Concern (region or NA)
  • R2R_level: Whether it is a Road to Recovery Tipping Point Species and on which Alert List (Red, Orange or Yellow)
  • pct_ brding_pop: The estimated percent of the species’ global population breeding in the state (source: eBird state-level data. Data are only shown for modeled species. 
  • Nb_biome: Non-breeding biome (source ACAD)
  • Nb_hab_1: Broad non-breeding habitat class (source ACAD)
  • Nb_hab_1: Descriptive non-breeding habitat class(source ACAD)
  • Focal: Do we provide a focal species account (TRUE or FALSE)

 

 

Multi-species Connections

This map shows direct connections between Colorado and other locations across the Western Hemisphere based on tagging data available in the Bird Migration Explorer for the state’s migratory focal species. Connections are based on bird band encounter records, automated radio telemetry, archival geolocators, satellite and GPS tracking, or genetic markers that document the movement of individual birds. The map displays the number of migratory focal species that connect each location (hexagon) to Colorado. While these data offer valuable insight, they do not capture the complete picture of all connections because they only present available tagging data for the subset of species of concern identified by each state. The multi-species tagging connections map illustrates the need to protect, restore, enhance and manage safe habitat in locations connected to the state to ensure migratory species can access the resources they need across the full annual cycle. As individual birds travel between species’ summer (breeding) and winter (stationary non-breeding) ranges, they traverse geopolitical boundaries, underscoring the need for coordinated conservation efforts to maximize the return on conservation investments in Colorado. Additionally, multi-species connection maps illustrate Colorado's crucial role in safeguarding the migratory movements of these species.

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for the state’s migratory focal species. Data were generously shared by researchers and partners for the Bird Migration Explorer.  The map displays the number of tagged focal species that connect locations to Colorado. Download map. 

How was this map created?

The multi-species connections maps are based on millions of observations generously shared by a variety of data holders and partner organizations. Key sources of data for tagging birds include: band encounter records from the USGS Eastern Ecological Science Center Bird Banding Lab, automated radio telemetry from the Motus global wildlife tracking network developed and managed by Birds Canada, location data from hundreds of tracked birds shared by our partners and the research community on Movebank, and genetic connectivity data shared by the Bird Genoscape Project. The original data are archived by each of these partners. The tagging data are summarized across the entire timespan inclusive of these datasets (1914-2023) for the state's set of focal species.
Bird movements were aggregated and summarized into 150-km hexagons covering the Americas. We pre-processed data to remove points with high locational error (i.e., outliers), such as points collected during the equinox period for light-level geolocator data and incomplete or questionable banding and automated radio telemetry records.
For each species, the remaining points were intersected with the 150-km hexagon grid. We considered hexagons to be connected so long as the same individual occurred in both of them, whether those occurrences were within the same year or across multiple years. We filtered the linked hexagon pairs to just those with hexagons intersecting the state. The final multi-species connections map displays the number of focal species that connect each location to the state.

Focal Migratory Species Accounts

For a selection of focal migratory species relevant to Colorado, we provide an account with detailed information about their conservation status, a Species-specific Connections Map illustrating its hemispheric connections across the annual cycle, and a list of  the conservation challenges (human activities and environmental changes) faced across the year, current Southern Wings projects and links to additional resources about each species. 

Species accounts were selected in consultation with state agency staff based on the Focal Migratory Species List. In brief, species were selected from the Focal Migratory Species List by extracting all SGCN based on 2015 SWAPs and prioritizing species based on: (1) the percentage of the breeding populations in Colorado; (2) each species’ Road to Recovery level; and (3) input from state agency staff. We expect the list of species accounts to change over time as state’s release updated SWAPs and SGCN. 

 

Species Connection Maps

The species connection maps show direct connections between Colorado and locations across the Western Hemisphere based on tagging data in the Bird Migration Explorer available for each of the state’s migratory species of concern. Connections are based on bird band encounter records, automated radio telemetry, archival geolocators, satellite and GPS tracking, or genetic markers that document the movement of individual birds. The maps display locations (i.e., hexagons) that are connected to Colorado (polygon outlined orange) and illustrate the need to protect, restore, enhance and manage safe habitat in those areas to ensure species can satisfy their biological requirements across the full annual cycle. As individual birds travel between the species’ summer (breeding) and winter (stationary non-breeding) ranges, they traverse geopolitical boundaries, underscoring the need for collaborative and coordinated conservation efforts to maximize the return on conservation investments for the species in Colorado. While these maps offer valuable insight, they do not capture the complete picture of all connections, because they only present tagging data available in the Bird Migration Explorer. In some cases, species may not have a connection map, because no tagging data are available.

How were the species connections maps created?

The species connections maps are based on millions of observations generously shared by a variety of data holders and partner organizations. Key sources of data for tagged birds include: band encounter records from the USGS Bird Banding Lab, automated radio telemetry from the Motus global wildlife tracking network developed and managed by Birds Canada, location data from hundreds of tracked birds shared by our partners and the research community on Movebank, and genetic connectivity data shared by the Bird Genoscape Project. Seasonal ranges are derived from eBird at the Cornell Lab and data from BirdLife International and Audubon. The original data are archived by each of these partners. The tagging data are summarized across all datasets (including years 1914-2023) for the species.

Bird movements were aggregated and summarized into 150-km hexagons covering the Americas. We pre-processed data to remove points with high locational error (i.e., outliers), such as points collected during the equinox period for light-level geolocator data and incomplete or questionable banding and automated radio telemetry records.

For each species, the remaining points were intersected with a 150-km hexagon grid. We considered hexagons to be connected so long as the same individual occurred in both of them, whether those occurrences were within the same year or across multiple years. We filtered the linked hexagon pairs to just those with hexagons intersecting the state.

The final species connections maps display the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state.

 

Conservation Challenges

Conservation Challenges are human activities and environmental changes that a species is sensitive to during its annual cycle. Threats are defined as human activities and environmental changes that negatively impact a migratory bird species (Salafsky et al. 2008); however, many human activities that present threats to birds can also present a component of the solution. The term “conservation challenge” conveys both the risk and opportunity associated with each of these activities. 

The list of conservation challenges provided for each species is derived from the conservation challenges that are included in the Bird Migration Explorer, which are those conservation challenges that are accurately and consistently mapped across the Western Hemisphere.

How were conservation challenges identified?

We used the list of 19 conservation challenges that were included in the Bird Migration Explorer. The “About the Bird Migration Explorer Conservation Challenges” provides a detailed description of how the 19 challenges were selected for inclusion in the Explorer.

The Bird Migration Explorer used the conservation lexicon developed by Salafsky et al. (2008) and subsequently used in multiple conservation planning frameworks to identify the conservation challenges relevant for each migratory species. In this framework, threats are defined as human activities that negatively impact bird species (Salafsky et al. 2008). Sensitivity is the extent to which stresses linked to threat exposure negatively impact a species. Based on a combination of literature review and expert knowledge within this framework, 88 threats relevant to migratory birds were developed. Stresses are the attributes of a species’ ecology that are impaired by threats (Salafsky et al. 2008). The Explorer used a list of seven stresses adapted from the list used by IUCN (International Union for Conservation of Nature 2012). Next, to identify a subset of threats that each species was sensitive to, a literature review was conducted to determine which threats have a negative impact on a species and the stresses that the threat causes to it. In cases where there was no information on a species sensitivity to a threat, but sensitivity to the threat was documented for a similar related species (e.g., same genus, or similar life history characteristics), both species were considered to be sensitive to it.

Next, threats were pooled into conservation challenges (e.g., agricultural pesticide/herbicide application and agricultural development threats were merged into the conservation challenge of agriculture). The list of conservation challenges was narrowed to those that could be accurately and consistently mapped across the Western Hemisphere, which resulted in 19 conservation challenges that were included in the Bird Migration Explorer. Because some conservation challenges, like invasive and problematic species (e.g., outdoor cats) do not have available hemispheric maps, the list of conservation challenges is not comprehensive. The list of conservation challenges on the Bird Migration Explorer and included in this online guide include:

  • Urban Areas
  • Surburban Areas
  • Coastal Modification
  • Agriculture
  • Livestock Management
  • Oil and Gas Production
  • Wind Turbines
  • Roads
  • Power Lines
  • Communication Towers
  • Forest Management
  • Coastal Disturbance
  • Groundwater Depletion
  • Surface Water Management
  • Light Pollution
  • Water Quality
  • Sea Level Rise
  • Increasingly Severe Flooding
  • Drought

Literature cited

Salafsky N et al. 2008. A standard lexicon for biodiversity conservation: Unified classifications of threats and actions. Conservation Biology 22:897–911.

 

Scroll down the list of species and click on any particular one to expand its account. 

Mountain Plover (Anarhynchus montanus)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: Red

Percent of population breeding in state: 36.31%

Nonbreeding biome and habitat: North American Southwest (Grasslands: Chihuahuan)

Photo Credit: Aaron Maizlish via Flickr, CC BY-NC 2.0

Connections map:

Colorado_mouplo.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Mountain Plover shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Mountain Plover on the Bird Migration Explorer. Download map.

 

Conservation Challenges

Below is a list of conservation challenges faced by Mountain Plover across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • power lines
  • communication towers
  • surface water management
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.

More resources on this species:

Black Swift (Cypseloides niger)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: Orange

Percent of population breeding in state: 0.57%

Nonbreeding biome and habitat: South American Lowlands (Forest Aerial: Tropical Generalist)

Only if a project identifies a clear connection between habitat/resources swifts use during migration or winter (e.g.aerial insects)

Photo Credit: Spring Fed Images via Unsplash, Unsplash License

Species connections map:

Colorado_blkswi.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Black Swift shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Black Swift on the Bird Migration Explorer. Download map.
 

Conservation Challenges

Below is a list of conservation challenges faced by Black Swift across the full annual cycle, including:

  • urban areas
  • suburban areas
  • forest management
  • surface water management
  • coastal modification
  • increasingly frequent flooding

For maps of threats facing this species, see the Bird Migration Explorer.
 

Southern Wings project:

Conservation and Management of Neotropical Migratory Birds and Thick- billed Parrots in old-growth forests of the Sierra Madre Occidental, Mexico
 

More resources on this species:

Olive-sided Flycatcher (Contopus cooperi)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: Yellow

Percent of population breeding in state: 1.39%

Nonbreeding biome and habitat: Central and South American Highlands (Forests: Tropical Montane Evergreen; Forests: Tropical Lowland Evergreen)

Photo Credit: Andy Reago & Chrissy McClarren via Flickr, CC BY 2.0

Species connections map:

Colorado_olsfly.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Olive-sided Flycatcher shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Olive-sided Flycatcher on the Bird Migration Explorer. Download map.

 

Conservation Challenges

Below is a list of conservation challenges faced by Olive-sided Flycatcher across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • power lines
  • communication towers
  • forest management
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.
 

Southern Wings projects:

Neotropical Flyway Project
Protection of Wintering and Stop-Over sites in the Conservation Coast Birdscape, Guatemala
Conservation of Neotropical Migratory Birds in the Dry Tropical Forests of El Salvador: Assessing and Addressing Threats to Overwintering Habitat and Bird Populations
Conservation and Management of Neotropical Migratory Birds and Thick- billed Parrots in old-growth forests of the Sierra Madre Occidental, Mexico
Migratory Bird Wintering Grounds Conservation in Nicaragua
Protection of Wintering and Stop-Over sites in the Conservation Coast Birdscape, Guatemala
Restoration of Migratory Bird Habitat in Ecuador
Improving migratory bird habitat in Colombia

 

More resources on this species:

Broad-tailed Hummingbird (Selasphorus platycercus)

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Status: ⚠ Not an SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 38.71%

Nonbreeding biome and habitat: Mesoamerican Highlands (Forests: Mesoamerican Pine-Oak)

Photo Credit: Robin Gwen Agarwal via Flickr, CC BY-NC 2.0

Species connections map:

Colorado_brthum.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Broad-tailed Hummingbird shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Broad-tailed Hummingbird on the Bird Migration Explorer. Download map.

 

Conservation Challenges

Below is a list of conservation challenges faced by Broad-tailed Hummingbird across the full annual cycle, including:

  • urban areas
  • suburban areas
  • livestock management
  • drought

For maps of threats facing this species, see the Bird Migration Explorer.

More resources on this species:

Virginia’s Warbler (Leiothlypis virginiae)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 29.87%

Nonbreeding biome and habitat: Mesoamerican Pacific Lowlands (Forests: Tropical Dry; Forests: Mesoamerican Pine-Oak)

Photo credit: Virginia's Warbler by Nick Athanas via Flickr, CC BY-NC-SA 2.0

No tracking data available from the Bird Migration Explorer’s partners for this species in the state.

Conservation Challenges

Below is a list of conservation challenges faced by Virginia's Warbler across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • wind turbines
  • communication towers
  • coastal modification
  • light pollution
  • drought

For maps of threats facing this species, see the Bird Migration Explorer.

More resources on this species:

Lark Bunting (Calamospiza melanocorys)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 17.15%

Nonbreeding biome and habitat: North American Southwest (Grasslands: Chihuahuan; Aridlands: Desert Scrub)

Photo credit: Lark Bunting by Daniel Arndt via Flickr, CC BY-NC-SA 2.0

No tracking data available from the Bird Migration Explorer’s partners for this species in the state.
 

Conservation Challenges

Below is a list of conservation challenges faced by Lark Bunting across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • oil and gas production
  • roads
  • communication towers
  • coastal modification
  • light pollution
  • drought
  • increasingly frequent flooding

For maps of threats facing this species, see the Bird Migration Explorer.


Southern Wings projects:

Protection of Desert Grasslands Migratory Bird Habitat in the El Tokio Grassland Priority Conservation Area
A Sustainable Grazing Network to Protect and Restore Grasslands on Private and Communal Lands in Mexico's Chihuahuan Desert

 

More resources on this species:

Cassin’s Sparrow (Peucaea cassinii)

Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 10.41%

Nonbreeding biome and habitat: North American Southwest (Grasslands: Chihuahuan)

No tracking data available from the Bird Migration Explorer’s partners for this species in the state.
 

Conservation Challenges

Below is a list of conservation challenges faced by Cassin's Sparrow across the full annual cycle, including:

  • urban areas
  • suburban areas
  • communication towers
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.


Southern Wings project:

A Sustainable Grazing Network to Protect and Restore Grasslands on Private and Communal Lands in Mexico's Chihuahuan Desert
 

More resources on this species:

Gray Vireo (Vireo vicinior)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 7.28%

Nonbreeding biome and habitat: North American Southwest (Aridlands: Desert Scrub)

Photo credit: Nick Athanas via Flickr, CC BY-NC-SA 2.0

No tracking data available from the Bird Migration Explorer’s partners for this species in the state.

Conservation Challenges

Below is a list of conservation challenges faced by Gray Vireo across the full annual cycle, including:

  • urban areas
  • agriculture
  • livestock management
  • wind turbines
  • communication towers
  • forest management
  • groundwater depletion
  • coastal modification
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.

More resources on this species:

Flammulated Owl (Psiloscops flammeolus)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 7.01%

Nonbreeding biome and habitat: Mesoamerican Highlands (Forests: Mesoamerican Pine-Oak)

Photo credit: sugarbear96 via Flickr, CC BY-NC 2.0

Species connections map:

Colorado_flaowl.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Flammulated Owl shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Flammulated Owl on the Bird Migration Explorer. Download map.
 

Conservation Challenges

Below is a list of conservation challenges faced by Flammulated Owl across the full annual cycle, including:

  • urban areas
  • suburban areas
  • power lines
  • forest management
  • light pollution
  • drought

For maps of threats facing this species, see the Bird Migration Explorer.

More resources on this species:

Swainson’s Hawk (Buteo swainsoni)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 6.79%

Nonbreeding biome and habitat: Temperate South America (Grasslands: Pampas and Campos)

Photo credit: Robin Gwen Agarwal via Flickr, CC BY-NC 2.0

Species connections map:

Colorado_swahaw.png

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Swainson's Hawk shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Swainson's Hawk on the Bird Migration Explorer. Download map.
 

Conservation Challenges

Below is a list of conservation challenges faced by Swainson's Hawk across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • oil and gas production
  • wind turbines
  • roads
  • power lines
  • coastal modification

For maps of threats facing this species, see the Bird Migration Explorer.
 

Southern Wings projects:

Conservation of Neotropical Migratory Birds in the Dry Tropical Forests of El Salvador: Assessing and Addressing Threats to Overwintering Habitat and Bird Populations
Protection of Desert Grasslands Migratory Bird Habitat in the El Tokio Grassland Priority Conservation Area
Protection of Wintering and Stop-Over sites in the Conservation Coast Birdscape, Guatemala

 

More resources on this species:

Brewer’s Sparrow (Spizella breweri)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 4.85%

Nonbreeding biome and habitat: North American Southwest (Aridlands: Desert Scrub)

Photo credit: Mick Thompson via Flickr, CC BY-NC 2.0

Species connections map:

Colorado_brespa.jpg

This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Brewer's Sparrow shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Brewer's Sparrow on the Bird Migration Explorer. Download map.
 

Conservation Challenges

Below is a list of conservation challenges faced by Brewer's Sparrow across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • oil and gas production
  • roads
  • communication towers
  • groundwater depletion
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.


Southern Wings projects:

Protection of Desert Grasslands Migratory Bird Habitat in the El Tokio Grassland Priority Conservation Area
A Sustainable Grazing Network to Protect and Restore Grasslands on Private and Communal Lands in Mexico's Chihuahuan Desert

 

More resources on this species:

Willow Flycatcher (Empidonax traillii)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 0.39%

Nonbreeding biome and habitat: Mesoamerica (Open Country: Habitat Mosaic)

Only for that subspecies

Photo credit: Mick Thompson via Flickr, CC BY-NC 2.0

Species connections map:

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This map shows direct connections between Colorado and locations across the hemisphere based on available tagging data for individual Willow Flycatcher shared by researchers for the Bird Migration Explorer. Data were generously shared by researchers for the Bird Migration Explorer. The map displays the hexagons that are connected to the state (dark purple) as well as hexagons with available tagging data for the species (light purple) with no direct connections to the state. Explore more connections for Willow Flycatcher on the Bird Migration Explorer. Download map.
 

Conservation Challenges

Below is a list of conservation challenges faced by Willow Flycatcher across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • livestock management
  • wind turbines
  • communication towers
  • forest management
  • surface water management
  • groundwater depletion
  • coastal modification
  • light pollution

For maps of threats facing this species, see the Bird Migration Explorer.


Southern Wings project:

Conservation of Neotropical Migratory Birds in the Dry Tropical Forests of El Salvador: Assessing and Addressing Threats to Overwintering Habitat and Bird Populations
 

More resources on this species:

Yellow-billed Cuckoo (Coccyzus americanus)

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Status: 2015 SGCN in Colorado

Regional SGCN: No

R2R Level: None

Percent of population breeding in state: 0.08%

Nonbreeding biome and habitat: South American Lowlands (Forests: Tropical Dry; Forests: Tropical Lowland Evergreen)

Only for that DPS

Photo credit: Doug Greenberg via Flickr, CC BY-NC 2.0

No tracking data available from the Bird Migration Explorer’s partners for this species in the state.
 

Conservation Challenges

Below is a list of conservation challenges faced by Yellow-billed Cuckoo across the full annual cycle, including:

  • urban areas
  • suburban areas
  • agriculture
  • wind turbines
  • roads
  • communication towers
  • forest management
  • surface water management
  • groundwater depletion
  • light pollution
  • drought

For maps of threats facing this species, see the Bird Migration Explorer.
 

Southern Wings projects:

Conservation of Wintering Habitats in the Yoro-Pico Bonito and Agalta-Lost City Birdscapes, Honduras
Neotropical Flyway Project
Improving migratory bird habitat in Colombia
Conservation of Neotropical Migratory Birds in the Dry Tropical Forests of El Salvador: Assessing and Addressing Threats to Overwintering Habitat and Bird Populations

 

More resources on this species:

Project Partners

Resources