BirdAnalyst
BBS Route · Colorado · BCR 16

Animas 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 94 species recorded across 14 survey years, still active.

94Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2005–2025Span
5Observers

Bird Species Found on Colorado Animas 2

Top 40 of 94 species by most recent count. Each links to its species trend.

Species recorded on the Animas 2 route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
European StarlingSturnidae352025+404%2007
Red-winged BlackbirdIcteridae342025-60%2007
Cliff SwallowHirundinidae342025-49%2007
Western MeadowlarkIcteridae282025-7%2007
American RobinTurdidae262025-20%2007
Yellow WarblerParulidae222025+800%2007
Western KingbirdTyrannidae192025+181%2007
Violet-green SwallowHirundinidae192025+43%2007
Eurasian Collared-DoveColumbidae192025+310%2009
Western Wood-PeweeTyrannidae172025+114%2007
Chipping SparrowPasserellidae152025+84%2007
Spotted TowheePasserellidae132025+244%2007
Barn SwallowHirundinidae122018+238%2009
House FinchFringillidae102025+58%2007
White-breasted NuthatchSittidae102018+217%2012
Black-billed MagpieCorvidae92025-35%2007
Black-headed GrosbeakCardinalidae92025-26%2007
Gray FlycatcherTyrannidae82018+467%2014
Brown-headed CowbirdIcteridae82025-11%2007
Brewer's BlackbirdIcteridae82025-56%2007
Bullock's OrioleIcteridae72025+23%2007
BushtitAegithalidae72025+24%2014
Canada GooseAnatidae72015+40%2007
Blue-gray GnatcatcherPolioptilidae72025+31%2013
Western TanagerCardinalidae72025n/an/a
Turkey VultureCathartidae62025-84%2008
Woodhouse's Scrub-JayCorvidae62025+0%2007
Common RavenCorvidae62025+25%2007
House SparrowPasseridae62025-12%2007
Yellow-breasted ChatIcteriidae62025+233%2015
Warbling VireoVireonidae52025n/an/a
Red-tailed HawkAccipitridae42025+100%2007
Lark SparrowPasserellidae42025+9%2007
Northern MockingbirdMimidae42025-20%2007
Mountain BluebirdTurdidae42025-15%2007
Mourning DoveColumbidae32021-66%2007
Cassin's KingbirdTyrannidae32025+200%2009
Ash-throated FlycatcherTyrannidae32025+69%2007
Brewer's SparrowPasserellidae32025+0%2015
Lazuli BuntingCardinalidae32017+0%2006

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.