BirdAnalyst
BBS Route · Colorado · BCR 16

Owl Creek Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 20 survey years, still active.

100Species 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 →
20Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2024Span
4Observers

Bird Species Found on Colorado Owl Creek Pass

Top 40 of 100 species by most recent count. Each links to its species trend.

Species recorded on the Owl Creek 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
Warbling VireoVireonidae422024+12%2000
American RobinTurdidae392024+54%2000
Northern House WrenTroglodytidae262024+380%2000
Red-winged BlackbirdIcteridae202024+247%2003
Violet-green SwallowHirundinidae192024+88%2000
Canada GooseAnatidae172023-56%2015
American CrowCorvidae162024+289%2000
Western TanagerCardinalidae162024+96%2000
Hermit ThrushTurdidae162024+50%2000
Orange-crowned WarblerParulidae152024+250%2000
Western Wood-PeweeTyrannidae142024+68%2000
Ruby-crowned KingletRegulidae142024+319%2001
Western MeadowlarkIcteridae122024+27%2001
Pine SiskinFringillidae122024-36%2000
Clark's NutcrackerCorvidae112024+340%2003
Evening GrosbeakFringillidae112024+118%2013
Cliff SwallowHirundinidae112015n/an/a
Yellow WarblerParulidae92024+200%2000
Mountain ChickadeeParidae92024+340%2000
Vesper SparrowPasserellidae82024+62%2000
Black-billed MagpieCorvidae72024+67%2001
Wilson's SnipeScolopacidae62024+33%2001
Steller's JayCorvidae62024-8%2000
MacGillivray's WarblerParulidae62024+83%2000
Broad-tailed HummingbirdTrochilidae52024-17%2000
Cassin's FinchFringillidae52024-50%2000
Chipping SparrowPasserellidae52024-19%2000
Dusky FlycatcherTyrannidae52024+150%2001
House FinchFringillidae52024+167%2021
Red CrossbillFringillidae42007+0%2000
Spotted TowheePasserellidae42024+22%2000
Green-tailed TowheePasserellidae32024+78%2000
Tree SwallowHirundinidae32023-33%2000
Brown CreeperCerthiidae32015+200%2012
Hairy WoodpeckerPicidae22022+0%2009
Brewer's BlackbirdIcteridae22024-86%2007
Brewer's SparrowPasserellidae22024+50%2021
Black-headed GrosbeakCardinalidae22024+40%2001
Plumbeous VireoVireonidae22012+40%2000
Virginia's WarblerParulidae22024-50%2000

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