BirdAnalyst
BBS Route · Colorado · BCR 16

Guffey Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 122 species recorded across 27 survey years, still active.

122Species 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 →
27Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–2024Span
2Observers

Bird Species Found on Colorado Guffey

Top 40 of 122 species by most recent count. Each links to its species trend.

Species recorded on the Guffey 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
California GullLaridae982202417×1994
American White PelicanPelecanidae260202425×1995
Double-crested CormorantPhalacrocoracidae1582024+790%1999
Pinyon JayCorvidae852024+783%1993
American CootRallidae51202251×2015
Horned LarkAlaudidae382024-14%1992
Western MeadowlarkIcteridae352024+27%1992
American RobinTurdidae312024+29%1992
Ruddy DuckAnatidae252015n/an/a
Canada GooseAnatidae222024-46%1992
Western Wood-PeweeTyrannidae192024+72%1992
Western GrebePodicipedidae182024+920%2001
Vesper SparrowPasserellidae162024+11%1993
Common RavenCorvidae152024+415%1992
Broad-tailed HummingbirdTrochilidae122024+450%1992
Clark's NutcrackerCorvidae122024+344%1992
Brown-headed CowbirdIcteridae122024-4%1992
Mountain BluebirdTurdidae122024+32%1992
Brewer's BlackbirdIcteridae112024+4%1992
Violet-green SwallowHirundinidae112024+236%1992
Steller's JayCorvidae82024-4%1992
Red-winged BlackbirdIcteridae82024+181%1992
Red CrossbillFringillidae82024+7%1996
Warbling VireoVireonidae82024+500%1997
RedheadAnatidae82016n/an/a
American CrowCorvidae72023-6%1994
Green-tailed TowheePasserellidae72024+800%1993
Pygmy NuthatchSittidae62024+8%1993
White-breasted NuthatchSittidae52024+433%1995
Rock WrenTroglodytidae52024+7%1997
House SparrowPasseridae52022-15%2009
Red-tailed HawkAccipitridae42024-46%1992
European StarlingSturnidae42021+125%1999
Mountain ChickadeeParidae42024+156%1992
Black-headed GrosbeakCardinalidae42024+250%1999
Blue-gray GnatcatcherPolioptilidae41997n/an/a
Ruby-crowned KingletRegulidae42024+367%2006
Eared GrebePodicipedidae42017+0%2015
Northern ShovelerAnatidae42023+0%2016
Spotted SandpiperScolopacidae31990n/an/a

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