BirdAnalyst
BBS Route · Colorado · BCR 16

Basin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 29 survey years, still active.

92Species 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 →
29Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1995–2024Span
4Observers

Bird Species Found on Colorado Basin

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Basin 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 LarkAlaudidae882024+88%1997
Western MeadowlarkIcteridae422024-62%1997
Mourning DoveColumbidae292024+207%1997
Common RavenCorvidae242024-24%1997
Sage ThrasherMimidae222024-27%1997
Brewer's SparrowPasserellidae192024-70%1997
Sagebrush SparrowPasserellidae142024+172%1997
Vesper SparrowPasserellidae122024-12%1997
BushtitAegithalidae122023+433%2006
Canada GooseAnatidae112019+450%2006
European StarlingSturnidae102024-31%1998
Spotted TowheePasserellidae102024-4%1997
House SparrowPasseridae102024+86%1998
Say's PhoebeTyrannidae92024+70%1997
Chipping SparrowPasserellidae92024+0%1997
Common NighthawkCaprimulgidae82023+183%2004
Barn SwallowHirundinidae72023+143%1997
American CrowCorvidae72024+75%2001
Gunnison Sage-GrousePhasianidae72000n/an/a
Black-billed MagpieCorvidae62024+280%1997
Blue-gray GnatcatcherPolioptilidae62024+22%1999
Red-tailed HawkAccipitridae52024+100%1998
Pinyon JayCorvidae52024+67%1998
Loggerhead ShrikeLaniidae52024+225%1998
Gray FlycatcherTyrannidae42024+20%1997
Brewer's BlackbirdIcteridae42022-82%1997
Ash-throated FlycatcherTyrannidae42024+250%1999
Mountain ChickadeeParidae42022+150%1998
GadwallAnatidae42010n/an/a
Rock WrenTroglodytidae32024+125%1997
Mountain BluebirdTurdidae32024-18%1997
Western KingbirdTyrannidae32024-11%2000
KilldeerCharadriidae22024-67%1997
Red-winged BlackbirdIcteridae22024-58%1997
Bullock's OrioleIcteridae22018+0%1999
Savannah SparrowPasserellidae22024-58%1997
Juniper TitmouseParidae22023+75%2010
White-throated SwiftApodidae22018+133%2001
Lazuli BuntingCardinalidae22012+100%1996
Tree SwallowHirundinidae22005-57%2001

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