BirdAnalyst
BBS Route · Colorado · BCR 18

Doyle Bridge 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 87 species recorded across 21 survey years, still active.

87Species 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 →
1998–2023Span
5Observers

Bird Species Found on Colorado Doyle Bridge 2

Top 40 of 87 species by most recent count. Each links to its species trend.

Species recorded on the Doyle Bridge 2 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
European StarlingSturnidae632023-63%2001
Western MeadowlarkIcteridae572023-69%2001
Western KingbirdTyrannidae222023+5%2001
Mourning DoveColumbidae202023-80%2001
Northern MockingbirdMimidae202023-20%2001
Great-tailed GrackleIcteridae172022+11%2001
Black-billed MagpieCorvidae152023-39%2001
Blue GrosbeakCardinalidae152023-36%2001
Canada GooseAnatidae152003n/an/a
Bullock's OrioleIcteridae122023-14%2001
White-faced IbisThreskiornithidae121999n/an/a
Cliff SwallowHirundinidae122023-83%2009
Downy WoodpeckerPicidae122011+333%2008
Rock PigeonColumbidae112021-7%2001
Common RavenCorvidae112006+0%1998
Common GrackleIcteridae102023-63%2001
Lark BuntingPasserellidae102022+20%2003
Eurasian Collared-DoveColumbidae102022+21%2009
Turkey VultureCathartidae92021+800%2014
Horned LarkAlaudidae72023-87%2001
Red-winged BlackbirdIcteridae72023-87%2001
Barn SwallowHirundinidae72023-43%2001
Chihuahuan RavenCorvidae72022+100%2016
Say's PhoebeTyrannidae62023+160%2002
Cassin's SparrowPasserellidae62022-31%2001
Red-tailed HawkAccipitridae52023+46%2001
Lark SparrowPasserellidae52023-69%2001
House SparrowPasseridae52023-29%2001
Brewer's SparrowPasserellidae52021+400%2019
KilldeerCharadriidae42023-84%2001
Scaled QuailOdontophoridae42019+19%2001
Yellow-billed CuckooCuculidae42001+300%1998
Canyon TowheePasserellidae42007n/an/a
American KestrelFalconidae32023-72%2001
Brown-headed CowbirdIcteridae32023+180%2001
Loggerhead ShrikeLaniidae32023+60%2001
Yellow-breasted ChatIcteriidae32023-41%2001
Northern House WrenTroglodytidae32023-42%2001
Ash-throated FlycatcherTyrannidae32023-30%2008
MallardAnatidae22022+50%2003

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