BirdAnalyst
BBS Route · Colorado · BCR 16

Owl Creek Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 101 species recorded across 21 survey years, still active.

101Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
4Observers

Bird Species Found on Colorado Owl Creek Pass

Top 40 of 101 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 VireoVireonidae442025+17%2000
American RobinTurdidae392025+54%2000
Pine SiskinFringillidae302025-4%2000
Violet-green SwallowHirundinidae252025+106%2000
Ruby-crowned KingletRegulidae242025+288%2001
Red-winged BlackbirdIcteridae192025+267%2003
Canada GooseAnatidae172023-56%2015
Orange-crowned WarblerParulidae162025+467%2000
Western Wood-PeweeTyrannidae152025+95%2000
Western MeadowlarkIcteridae132025+31%2001
Northern House WrenTroglodytidae132025+430%2000
Black-billed MagpieCorvidae132025+167%2001
Chipping SparrowPasserellidae122025+10%2000
Hermit ThrushTurdidae122025+83%2000
Clark's NutcrackerCorvidae112024+340%2003
Cliff SwallowHirundinidae112015n/an/a
Evening GrosbeakFringillidae82025+91%2013
Spotted TowheePasserellidae72025+56%2000
Mountain ChickadeeParidae62025+240%2000
American CrowCorvidae52025+267%2000
Black-headed GrosbeakCardinalidae52025+0%2001
Cassin's FinchFringillidae42025-29%2000
Red CrossbillFringillidae42007+0%2000
Lincoln's SparrowPasserellidae42025-63%2000
Green-tailed TowheePasserellidae42025+67%2000
Common RavenCorvidae42025-22%2004
Red-breasted NuthatchSittidae42025+0%2003
Broad-tailed HummingbirdTrochilidae32025-17%2000
Steller's JayCorvidae32025+0%2000
Vesper SparrowPasserellidae32025+15%2000
Dusky FlycatcherTyrannidae32025+125%2001
Song SparrowPasserellidae32025+100%2008
Mountain BluebirdTurdidae32025+29%2003
Brown CreeperCerthiidae32015+200%2012
Say's PhoebeTyrannidae32025-30%2022
Hammond's FlycatcherTyrannidae32025+33%2022
Wilson's SnipeScolopacidae22025+50%2001
Brewer's BlackbirdIcteridae22024-86%2007
Western TanagerCardinalidae22025+46%2000
Tree SwallowHirundinidae22025-61%2000

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