BirdAnalyst
BBS Route · Colorado · BCR 16

San Luis Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 25 survey years, no longer active.

99Species 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 →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2025Span
7Observers

Bird Species Found on Colorado San Luis

Top 40 of 99 species by most recent count. Each links to its species trend.

Species recorded on the San Luis 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
Horned LarkAlaudidae772025-22%1993
Lark BuntingPasserellidae442025+880%2004
Red-winged BlackbirdIcteridae232025+467%1993
Common RavenCorvidae222025+508%1993
Vesper SparrowPasserellidae202025-31%1993
Sage ThrasherMimidae202024-18%1993
Western MeadowlarkIcteridae172025+43%1993
Mourning DoveColumbidae162025+62%1993
White-faced IbisThreskiornithidae132021n/an/a
Cliff SwallowHirundinidae112025-47%2009
European StarlingSturnidae102024+157%1996
Bank SwallowHirundinidae102000-47%1997
Black-throated SparrowPasserellidae91996n/an/a
Black-billed MagpieCorvidae82025+256%1993
Brewer's BlackbirdIcteridae82024-8%1993
American RobinTurdidae82015+117%1993
American White PelicanPelecanidae82000n/an/a
Red-tailed HawkAccipitridae72025+200%1995
Barn SwallowHirundinidae62015-50%1995
Western Wood-PeweeTyrannidae52015+167%1998
Eurasian Collared-DoveColumbidae52025+150%2015
Wilson's SnipeScolopacidae41999+167%1995
Yellow-headed BlackbirdIcteridae42025-74%1993
KilldeerCharadriidae42015-22%1998
Brewer's SparrowPasserellidae32025-69%1996
Song SparrowPasserellidae32024+43%1997
Northern Rough-winged SwallowHirundinidae32015-36%1993
Marsh WrenTroglodytidae32000+200%1991
MallardAnatidae32025+17%1996
Canada GooseAnatidae32004+717%1995
Say's PhoebeTyrannidae32024+175%1996
Green-tailed TowheePasserellidae32023+50%2006
Blue-winged TealAnatidae32010+50%1995
Lark SparrowPasserellidae32024-42%1997
Northern PintailAnatidae31996n/an/a
American AvocetRecurvirostridae32007+50%1996
Mountain PloverCharadriidae32022n/an/a
RedheadAnatidae22009-14%1997
Ruddy DuckAnatidae21993+100%1991
Northern HarrierAccipitridae22009+33%2000

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