BirdAnalyst
BBS Route · Colorado · BCR 16

Animas 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 90 species recorded across 13 survey years, still active.

90Species 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 →
13Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2005–2021Span
4Observers

Bird Species Found on Colorado Animas 2

Top 40 of 90 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
Cliff SwallowHirundinidae492018-51%2007
Red-winged BlackbirdIcteridae242021-65%2007
Brewer's BlackbirdIcteridae212018-40%2007
Western KingbirdTyrannidae192021+171%2007
Western Wood-PeweeTyrannidae192021+169%2007
Western MeadowlarkIcteridae182021-5%2007
Yellow WarblerParulidae172021+757%2007
American CrowCorvidae152021-10%2008
BushtitAegithalidae142017+56%2005
Mountain BluebirdTurdidae142018+58%2007
Barn SwallowHirundinidae122018+238%2009
American RobinTurdidae112021-16%2007
European StarlingSturnidae102021+483%2007
Spotted TowheePasserellidae102021+167%2007
White-breasted NuthatchSittidae102018+217%2012
Pinyon JayCorvidae92018+267%2007
House FinchFringillidae92021+100%2007
Gray FlycatcherTyrannidae82018+467%2014
Brown-headed CowbirdIcteridae82018+16%2007
Northern MockingbirdMimidae82021-30%2007
Canada GooseAnatidae72015+40%2007
Cassin's KingbirdTyrannidae62021+414%2009
Ash-throated FlycatcherTyrannidae62021+200%2007
House SparrowPasseridae62021-6%2007
KilldeerCharadriidae52018+40%2009
Common RavenCorvidae52021+61%2007
Chipping SparrowPasserellidae52021+64%2007
Turkey VultureCathartidae42021-88%2008
Red-tailed HawkAccipitridae42021+113%2007
Woodhouse's Scrub-JayCorvidae42018-15%2007
Lark SparrowPasserellidae42021+27%2007
Blue GrosbeakCardinalidae42021-40%2007
Lesser GoldfinchFringillidae42021+291%2009
Song SparrowPasserellidae42018+0%2013
Mourning DoveColumbidae32021-66%2007
Say's PhoebeTyrannidae32018+75%2007
Black-billed MagpieCorvidae32021-28%2007
American GoldfinchFringillidae32016+20%2009
Lazuli BuntingCardinalidae32017+0%2006
Northern Rough-winged SwallowHirundinidae32018-64%2007

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.