BirdAnalyst
BBS Route · Colorado · BCR 16

Colona Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 40 survey years, no longer active.

113Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2014Span
7Observers

Bird Species Found on Colorado Colona

Top 40 of 113 species by most recent count. Each links to its species trend.

Species recorded on the Colona 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
American RobinTurdidae452014-53%1974
Violet-green SwallowHirundinidae332014+67%1974
Warbling VireoVireonidae212014+8%1974
Western MeadowlarkIcteridae202014+83%1974
Brewer's BlackbirdIcteridae172014-40%1974
European StarlingSturnidae172014-37%1975
Green-tailed TowheePasserellidae152014+227%1976
American CrowCorvidae132014-7%1981
Brewer's SparrowPasserellidae102014-37%1975
Northern House WrenTroglodytidae102014+51%1974
Dusky FlycatcherTyrannidae102012+32%1985
Horned LarkAlaudidae82014-70%1974
MallardAnatidae82014+63%1978
Western Wood-PeweeTyrannidae72014+82%1974
Pine SiskinFringillidae72012-54%1974
Broad-tailed HummingbirdTrochilidae62014+17%1974
Mountain BluebirdTurdidae62014+53%1974
Red CrossbillFringillidae62008-46%1994
Black-billed MagpieCorvidae52014+183%1974
Savannah SparrowPasserellidae52012+9%1984
Chipping SparrowPasserellidae52014+25%1974
Vesper SparrowPasserellidae52014-21%1975
Gunnison Sage-GrousePhasianidae51979n/an/a
Clark's NutcrackerCorvidae42012+125%1975
Song SparrowPasserellidae42014+0%1974
Orange-crowned WarblerParulidae42012+78%1974
Yellow WarblerParulidae42014-4%1974
Black-capped ChickadeeParidae42014+200%1976
American GoldfinchFringillidae41987+0%1983
Mourning DoveColumbidae32014-36%1974
American KestrelFalconidae32014-20%1975
Spotted TowheePasserellidae32006-17%1974
Wilson's WarblerParulidae31981+0%1974
Mountain ChickadeeParidae32014+0%1983
Western BluebirdTurdidae32014-13%2006
Red-tailed HawkAccipitridae32010+17%1976
Common RavenCorvidae32014+60%1976
Lark SparrowPasserellidae31979+50%1974
Evening GrosbeakFringillidae32010+100%1980
Pygmy NuthatchSittidae32007+200%2006

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