BirdAnalyst
BBS Route · Colorado · BCR 16

Cheesman Lk Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 109 species recorded across 50 survey years, still active.

109Species 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 →
50Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2024Span
5Observers

Bird Species Found on Colorado Cheesman Lk

Top 40 of 109 species by most recent count. Each links to its species trend.

Species recorded on the Cheesman Lk 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
American RobinTurdidae462024-7%1971
Warbling VireoVireonidae302024+66%1971
Violet-green SwallowHirundinidae222024-22%1971
Broad-tailed HummingbirdTrochilidae212024+8%1971
Western TanagerCardinalidae212024+13%1971
Cliff SwallowHirundinidae202021+567%1977
Yellow WarblerParulidae152024+178%1971
Mourning DoveColumbidae152024-44%1972
Tree SwallowHirundinidae142019+700%1979
Pygmy NuthatchSittidae132022-11%1971
Western Wood-PeweeTyrannidae112024+31%1971
Chipping SparrowPasserellidae92024+57%1971
Green-tailed TowheePasserellidae92024-51%1971
American CrowCorvidae92024+200%1975
American GoldfinchFringillidae92024+350%1996
Northern House WrenTroglodytidae82024+64%1971
Spotted TowheePasserellidae82024+225%1991
Olive-sided FlycatcherTyrannidae62024+0%1971
Pine SiskinFringillidae62024+22%1972
Virginia's WarblerParulidae62024+18%1973
Western BluebirdTurdidae62018+175%1972
Western MeadowlarkIcteridae62024+275%1989
Song SparrowPasserellidae52024-46%1971
White-breasted NuthatchSittidae52021+33%1972
Common RavenCorvidae42024+200%1974
Brewer's BlackbirdIcteridae42019+233%1978
House SparrowPasseridae41981-33%1980
Black-headed GrosbeakCardinalidae32024+56%1971
Plumbeous VireoVireonidae32024-71%1971
European StarlingSturnidae31999+0%1972
Red-naped SapsuckerPicidae32021+133%1977
Downy WoodpeckerPicidae32024+100%1999
Hammond's FlycatcherTyrannidae32021-86%1990
House FinchFringillidae32024-25%2000
Canyon WrenTroglodytidae32010+200%2007
Steller's JayCorvidae22024-44%1971
Mountain ChickadeeParidae22024-61%1971
Hermit ThrushTurdidae22022-57%1971
Red CrossbillFringillidae22024-50%1972
Mountain BluebirdTurdidae22017+0%1972

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