BirdAnalyst
BBS Route · Colorado · BCR 16

Yellowjacket Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 121 species recorded across 21 survey years, still active.

121Species 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
7Observers

Bird Species Found on Colorado Yellowjacket Pass

Top 40 of 121 species by most recent count. Each links to its species trend.

Species recorded on the Yellowjacket 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
Red-winged BlackbirdIcteridae1372025+254%2001
Black-billed MagpieCorvidae662025+20%2001
American CrowCorvidae632025+891%2001
American RobinTurdidae542025+6%2001
Green-tailed TowheePasserellidae452025+28%2001
Spotted TowheePasserellidae422025+130%2001
Vesper SparrowPasserellidae372025+94%2001
Brewer's BlackbirdIcteridae332025-50%2001
Yellow WarblerParulidae312025+131%2001
Brown-headed CowbirdIcteridae262025+12%2001
Cliff SwallowHirundinidae222025-32%2001
Song SparrowPasserellidae192025+15%2001
Mountain BluebirdTurdidae192025+300%2001
Western MeadowlarkIcteridae162025-13%2001
Western KingbirdTyrannidae142025+313%2003
Gray CatbirdMimidae132025+300%2001
Mourning DoveColumbidae112025-26%2001
Barn SwallowHirundinidae112025+50%2001
Common RavenCorvidae112025+283%2008
Northern Rough-winged SwallowHirundinidae102025-37%2001
Virginia's WarblerParulidae102025+50%2001
Northern House WrenTroglodytidae102025+88%2001
American GoldfinchFringillidae92025-6%2001
Tree SwallowHirundinidae92025+17%2001
Red CrossbillFringillidae92024n/an/a
European StarlingSturnidae82025+33%2001
Brewer's SparrowPasserellidae82025+212%2001
MallardAnatidae82025+222%2003
Lesser GoldfinchFringillidae82025+700%2021
Red-tailed HawkAccipitridae72025+67%2003
Violet-green SwallowHirundinidae72025-82%2007
Turkey VultureCathartidae72025+200%2010
Orange-crowned WarblerParulidae72025+36%2009
American CootRallidae62025+175%2001
White-throated SwiftApodidae62025+6%2001
Bullock's OrioleIcteridae62025+117%2003
Warbling VireoVireonidae62025-16%2001
MacGillivray's WarblerParulidae62025-58%2001
Sage ThrasherMimidae62025+425%2003
Canada GooseAnatidae62015-88%2003

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