BirdAnalyst
BBS Route · Colorado · BCR 16

Douglas Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 123 species recorded across 34 survey years, still active.

123Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1982–2024Span
7Observers

Bird Species Found on Colorado Douglas Pass

Top 40 of 123 species by most recent count. Each links to its species trend.

Species recorded on the Douglas Pass 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
Canada GooseAnatidae1052022+650%2000
American RobinTurdidae622024+35%1986
Mourning DoveColumbidae582024+287%1986
Green-tailed TowheePasserellidae522024+37%1986
Spotted TowheePasserellidae512024+79%1986
American CrowCorvidae46202424×1995
Lazuli BuntingCardinalidae422024+247%1986
Black-billed MagpieCorvidae362024-20%1986
Red-winged BlackbirdIcteridae332024+191%1986
Lark SparrowPasserellidae312024+74%1986
Blue-gray GnatcatcherPolioptilidae292024+379%1986
Virginia's WarblerParulidae242024+37%1986
Ash-throated FlycatcherTyrannidae212024+167%1986
Western TanagerCardinalidae212024+185%1990
Violet-green SwallowHirundinidae192024+233%1986
Warbling VireoVireonidae182024+733%1986
Brown-headed CowbirdIcteridae172024+220%1987
Yellow WarblerParulidae152024+267%1986
Barn SwallowHirundinidae152024+185%1987
Chipping SparrowPasserellidae142024+13%1986
Brewer's SparrowPasserellidae132024+8%1986
Blue GrosbeakCardinalidae132024+333%1987
Yellow-breasted ChatIcteriidae132024+300%1988
Northern House WrenTroglodytidae132024-28%1987
Bullock's OrioleIcteridae122024+160%1986
Black-headed GrosbeakCardinalidae122024+680%1987
Plumbeous VireoVireonidae112024-6%1987
Western MeadowlarkIcteridae102024-57%1986
Dusky FlycatcherTyrannidae102024+47%1987
Western KingbirdTyrannidae92024+433%1988
MacGillivray's WarblerParulidae82024+24%1986
Rock WrenTroglodytidae82024-21%1986
Common RavenCorvidae72024-24%1986
House FinchFringillidae72024+108%1987
Orange-crowned WarblerParulidae72024+100%1991
White-throated SwiftApodidae62024+5%1987
Brewer's BlackbirdIcteridae62024-74%1986
Lark BuntingPasserellidae61982n/an/a
Lesser GoldfinchFringillidae62024-6%1987
Say's PhoebeTyrannidae62024-17%1990

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