BirdAnalyst
BBS Route · Colorado · BCR 16

Blackhead Pk Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 17 survey years, still active.

111Species 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 →
17Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2021Span
5Observers

Bird Species Found on Colorado Blackhead Pk

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Blackhead Pk 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 RobinTurdidae572021-37%1993
Red-winged BlackbirdIcteridae272021+56%1993
Common YellowthroatParulidae21202121×1999
Broad-tailed HummingbirdTrochilidae192021-58%1993
Western Wood-PeweeTyrannidae162021-37%1993
Common RavenCorvidae162021+42%1994
Yellow WarblerParulidae142021-43%1993
Steller's JayCorvidae112021-73%1993
Black-billed MagpieCorvidae102021+43%1993
Pine SiskinFringillidae102021-81%1993
Black-headed GrosbeakCardinalidae102021-38%1993
Warbling VireoVireonidae102021-70%1993
Spotted TowheePasserellidae102021+56%2000
Hairy WoodpeckerPicidae82021+10%1993
Mountain ChickadeeParidae82021-46%1993
Hermit ThrushTurdidae82021-71%1993
GadwallAnatidae81996n/an/a
Canada GooseAnatidae82021+48%2003
American GoldfinchFringillidae82021+167%2004
Bewick's WrenTroglodytidae82019n/an/a
Song SparrowPasserellidae72021-42%1993
Orange-crowned WarblerParulidae72021-17%1993
Wilson's WarblerParulidae72021-74%1993
Northern House WrenTroglodytidae72021-86%1993
Western BluebirdTurdidae72021-8%1993
Cliff SwallowHirundinidae72014+159%1996
Violet-green SwallowHirundinidae62021-63%1993
Golden-crowned KingletRegulidae62019+167%1996
Cassin's FinchFringillidae62021+200%1995
Mourning DoveColumbidae52021-56%1994
Clark's NutcrackerCorvidae51998-38%1996
White-crowned SparrowPasserellidae52001+0%2000
Turkey VultureCathartidae42021+300%1994
Olive-sided FlycatcherTyrannidae42014+38%1993
Green-tailed TowheePasserellidae42021-80%1993
Yellow-breasted ChatIcteriidae41996+300%1991
Ruby-crowned KingletRegulidae42021-64%1993
Lewis's WoodpeckerPicidae42019+80%1995
Gray CatbirdMimidae42021+100%1998
MacGillivray's WarblerParulidae42021-62%1995

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