BirdAnalyst
BBS Route · Colorado · BCR 18

Doyle Bridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 77 species recorded across 6 survey years, no longer active.

77Species 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 →
6Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–1997Span
1Observers

Bird Species Found on Colorado Doyle Bridge

Top 40 of 77 species by most recent count. Each links to its species trend.

Species recorded on the Doyle Bridge 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
Western MeadowlarkIcteridae2491997-18%1994
Lark BuntingPasserellidae184199523×1993
Mourning DoveColumbidae1441997+28%1994
European StarlingSturnidae691997-40%1994
Cliff SwallowHirundinidae521997+85%1993
Red-winged BlackbirdIcteridae431997-21%1994
Horned LarkAlaudidae391997-20%1994
Lark SparrowPasserellidae361997-38%1994
Black-billed MagpieCorvidae301997+11%1994
KilldeerCharadriidae271997+29%1994
Common GrackleIcteridae241997-39%1994
Blue GrosbeakCardinalidae231997+19%1994
Barn SwallowHirundinidae221997-6%1994
Western KingbirdTyrannidae191997-56%1994
Northern MockingbirdMimidae181997+77%1994
American KestrelFalconidae171997+8%1994
Bullock's OrioleIcteridae161997-41%1994
Scaled QuailOdontophoridae151997+21%1994
Northern BobwhiteOdontophoridae121997+220%1993
Great-tailed GrackleIcteridae121997+200%1996
Northern Rough-winged SwallowHirundinidae91995+80%1993
Great Horned OwlStrigidae81997+150%1993
Say's PhoebeTyrannidae81997-15%1994
Northern House WrenTroglodytidae61997-16%1994
Ring-necked PheasantPhasianidae51997-20%1994
Loggerhead ShrikeLaniidae51997+60%1994
House SparrowPasseridae51997-63%1994
RedheadAnatidae51995n/an/a
Wild TurkeyPhasianidae51996+400%1995
Burrowing OwlStrigidae41997+150%1994
Eastern KingbirdTyrannidae41997-15%1994
Yellow-breasted ChatIcteriidae41994+100%1992
American CrowCorvidae41995n/an/a
MallardAnatidae31996-50%1992
Swainson's HawkAccipitridae31997+20%1994
Red-tailed HawkAccipitridae21997+225%1994
Brown-headed CowbirdIcteridae21997-38%1994
Yellow-headed BlackbirdIcteridae21996+167%1993
Grasshopper SparrowPasserellidae21996+267%1993
Brown ThrasherMimidae21995+0%1993

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