BirdAnalyst
BBS Route · Colorado · BCR 16

Powderhorn Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 107 species recorded across 24 survey years, still active.

107Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1994–2025Span
4Observers

Bird Species Found on Colorado Powderhorn

Top 40 of 107 species by most recent count. Each links to its species trend.

Species recorded on the Powderhorn 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 BlackbirdIcteridae952025+121%1996
Green-tailed TowheePasserellidae41202517×1996
American RobinTurdidae392025+102%1996
Red CrossbillFringillidae372018+60%2006
Cliff SwallowHirundinidae282025+31%1996
Brewer's BlackbirdIcteridae272025+78%1996
Black-billed MagpieCorvidae252025+362%1997
Sage ThrasherMimidae212025+914%1996
Vesper SparrowPasserellidae18202514×2000
Brewer's SparrowPasserellidae132025+218%1996
Warbling VireoVireonidae132025+667%2001
Common RavenCorvidae112025+500%1998
Rock WrenTroglodytidae112025+480%2000
Mountain BluebirdTurdidae92025+300%1996
Western TanagerCardinalidae92025+867%1998
Common GrackleIcteridae92001n/an/a
Western Wood-PeweeTyrannidae92025+150%2006
Violet-green SwallowHirundinidae82025+10%1996
Clark's NutcrackerCorvidae82025+160%2006
Evening GrosbeakFringillidae82023+16%2019
Song SparrowPasserellidae72025+125%1997
Yellow WarblerParulidae72025+109%2001
Brown-headed CowbirdIcteridae72023+86%2002
Wilson's SnipeScolopacidae72025+58%2004
Pine SiskinFringillidae62025+380%1999
Ruby-crowned KingletRegulidae62025+64%1996
Broad-tailed HummingbirdTrochilidae62025+333%1998
Williamson's SapsuckerPicidae62023+67%2008
American CrowCorvidae52025+200%1996
Gunnison Sage-GrousePhasianidae52025+233%1997
Tree SwallowHirundinidae52023+10%1998
Mountain ChickadeeParidae52025+233%2004
GadwallAnatidae52019n/an/a
Mourning DoveColumbidae42025+13%1996
Western MeadowlarkIcteridae42025-14%1996
Steller's JayCorvidae42025+50%1997
Cassin's FinchFringillidae42025+150%2014
Hammond's FlycatcherTyrannidae42025-36%2006
BushtitAegithalidae42005n/an/a
Chipping SparrowPasserellidae32023-38%2000

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