BirdAnalyst
BBS Route · Colorado · BCR 16

Alamosa Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 35 survey years, still active.

110Species 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 →
35Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2024Span
6Observers

Bird Species Found on Colorado Alamosa

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Alamosa 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
Red-winged BlackbirdIcteridae1712024+8%1991
Western MeadowlarkIcteridae622024-42%1991
Brewer's BlackbirdIcteridae592024-71%1991
Cliff SwallowHirundinidae542024+26%1993
Yellow-headed BlackbirdIcteridae432024-31%1991
House SparrowPasseridae362024+50%1991
Chipping SparrowPasserellidae271992n/an/a
Eared GrebePodicipedidae242023n/an/a
Mourning DoveColumbidae232024-46%1991
Horned LarkAlaudidae222024-27%1991
Barn SwallowHirundinidae202024-52%1991
European StarlingSturnidae192024-13%1991
Black-billed MagpieCorvidae132024-70%1991
MallardAnatidae122024-78%1991
Brown-headed CowbirdIcteridae112024+50%1991
Yellow WarblerParulidae112024-58%1991
Rock PigeonColumbidae102024-19%1991
Lark BuntingPasserellidae102015+900%1995
KilldeerCharadriidae92024-76%1991
Sage ThrasherMimidae92024-62%1991
Black TernLaridae92023+55%1993
Song SparrowPasserellidae82024+6%1991
Western Wood-PeweeTyrannidae82024+475%1999
Wilson's PhalaropeScolopacidae62023-87%1991
Common NighthawkCaprimulgidae62024-66%1991
Common RavenCorvidae62024-36%1991
Vesper SparrowPasserellidae62024-41%1992
House FinchFringillidae62024-50%1997
American RobinTurdidae52024-56%1991
Northern PintailAnatidae42018-73%1992
Ring-necked DuckAnatidae41988n/an/a
Ruddy DuckAnatidae42024+0%1997
Wilson's SnipeScolopacidae42024-85%1991
Tree SwallowHirundinidae42023-85%1991
Northern House WrenTroglodytidae42024+56%1991
Western Cattle-EgretArdeidae42023+0%1989
Swainson's HawkAccipitridae42024+60%1994
Great-tailed GrackleIcteridae42024+133%2007
Cinnamon TealAnatidae32022-72%1991
White-faced IbisThreskiornithidae32024-79%1991

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