BirdAnalyst
BBS Route · Colorado · BCR 16

Dunckley Pas Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 86 species recorded across 32 survey years, still active.

86Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2024Span
3Observers

Bird Species Found on Colorado Dunckley Pas

Top 40 of 86 species by most recent count. Each links to its species trend.

Species recorded on the Dunckley Pas 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
Warbling VireoVireonidae552024+20%1994
American RobinTurdidae372024-9%1994
Violet-green SwallowHirundinidae332024+140%1994
Western TanagerCardinalidae242024+570%1994
White-crowned SparrowPasserellidae222024+30%1994
Pine SiskinFringillidae212024+165%1995
Northern House WrenTroglodytidae182024+34%1994
Lincoln's SparrowPasserellidae172024-11%1994
Hermit ThrushTurdidae172024+96%1994
Broad-tailed HummingbirdTrochilidae142024+65%1994
Green-tailed TowheePasserellidae132024-24%1994
MacGillivray's WarblerParulidae112024+35%1995
Mountain ChickadeeParidae112024+200%1996
Red-naped SapsuckerPicidae92024+93%1994
Western Wood-PeweeTyrannidae72024-21%1994
Common RavenCorvidae72024+120%1997
Yellow WarblerParulidae52024+86%1994
Ruby-crowned KingletRegulidae52024-45%1994
Swainson's ThrushTurdidae52024-8%1994
Dusky FlycatcherTyrannidae42024+44%1994
Black-billed MagpieCorvidae42018+125%1994
Chipping SparrowPasserellidae42024-9%2007
Red-tailed HawkAccipitridae42024+17%2001
Brewer's BlackbirdIcteridae42016+33%2010
Spotted TowheePasserellidae42024+29%2021
Common GrackleIcteridae42024n/an/a
Green-winged TealAnatidae32011+50%1992
Hairy WoodpeckerPicidae32023+100%1995
American GoldfinchFringillidae32024+0%2021
Cliff SwallowHirundinidae32024-69%1997
American CrowCorvidae32023+50%1998
Evening GrosbeakFringillidae32023+200%2002
Mourning DoveColumbidae32021-50%2004
Steller's JayCorvidae22024+233%1998
Pine GrosbeakFringillidae21995+100%1992
Cassin's FinchFringillidae22024-43%1994
Black-headed GrosbeakCardinalidae22024-17%1996
Red-breasted NuthatchSittidae22024+0%1994
Song SparrowPasserellidae22024-30%1995
Vesper SparrowPasserellidae22024+167%2000

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