BirdAnalyst
BBS Route · Colorado · BCR 16

Blackhead Pk Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 18 survey years, still active.

113Species 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 →
18Years 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
6Observers

Bird Species Found on Colorado Blackhead Pk

Top 40 of 113 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
Violet-green SwallowHirundinidae602025-19%1993
American RobinTurdidae472025-42%1993
Warbling VireoVireonidae382025-61%1993
Mourning DoveColumbidae262025+22%1994
European StarlingSturnidae262025+363%1994
Western Wood-PeweeTyrannidae252025-38%1993
Black-billed MagpieCorvidae252025+129%1993
Virginia's WarblerParulidae212025-35%1995
Common YellowthroatParulidae21202121×1999
Red-winged BlackbirdIcteridae172025+72%1993
Black-headed GrosbeakCardinalidae172025-10%1993
Brewer's BlackbirdIcteridae162025-35%1993
Western TanagerCardinalidae162025-76%1993
Lewis's WoodpeckerPicidae162025+380%1995
Dusky FlycatcherTyrannidae162025+26%1995
Steller's JayCorvidae152025-56%1993
Green-tailed TowheePasserellidae142025-84%1993
Northern House WrenTroglodytidae142025-83%1993
Orange-crowned WarblerParulidae132025+44%1993
Yellow WarblerParulidae132025-56%1993
Chipping SparrowPasserellidae122025-58%1993
Red CrossbillFringillidae112025+9%1997
Spotted TowheePasserellidae112025+44%2000
MacGillivray's WarblerParulidae102025-27%1995
Song SparrowPasserellidae92025-40%1993
White-breasted NuthatchSittidae92025+55%1994
Mountain ChickadeeParidae92025-26%1993
Broad-tailed HummingbirdTrochilidae82025-57%1993
MallardAnatidae82025+138%1997
Black-capped ChickadeeParidae82025+33%1997
GadwallAnatidae81996n/an/a
Bewick's WrenTroglodytidae82019n/an/a
Wilson's WarblerParulidae72021-74%1993
Western BluebirdTurdidae72021-8%1993
Gray CatbirdMimidae72025+300%1998
Common RavenCorvidae62025+53%1994
Ruby-crowned KingletRegulidae62025-52%1993
Golden-crowned KingletRegulidae62019+167%1996
Cassin's FinchFringillidae62021+200%1995
Hermit ThrushTurdidae52025-69%1993

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