BirdAnalyst
BBS Route · Colorado · BCR 18

Doyle Bridge 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 88 species recorded across 22 survey years, still active.

88Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
6Observers

Bird Species Found on Colorado Doyle Bridge 2

Top 40 of 88 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
Western MeadowlarkIcteridae692025-72%2001
Cliff SwallowHirundinidae502025-54%2009
Red-winged BlackbirdIcteridae372025-72%2001
Mourning DoveColumbidae332025-79%2001
Black-billed MagpieCorvidae202025-46%2001
Northern Rough-winged SwallowHirundinidae182025+850%2002
Western KingbirdTyrannidae172025-16%2001
Great-tailed GrackleIcteridae172022+11%2001
Blue GrosbeakCardinalidae152023-36%2001
Canada GooseAnatidae152003n/an/a
White-faced IbisThreskiornithidae121999n/an/a
European StarlingSturnidae92025-67%2001
Bullock's OrioleIcteridae82025-26%2001
Northern MockingbirdMimidae82025-37%2001
Eurasian Collared-DoveColumbidae82025+50%2009
Horned LarkAlaudidae72025-84%2001
Chihuahuan RavenCorvidae72022+100%2016
Rock PigeonColumbidae62025-11%2001
Cassin's SparrowPasserellidae62022-31%2001
Red-tailed HawkAccipitridae52023+46%2001
Lark SparrowPasserellidae52023-69%2001
House SparrowPasseridae52023-29%2001
Lark BuntingPasserellidae52025+7%2003
Brewer's SparrowPasserellidae52021+400%2019
Scaled QuailOdontophoridae42019+19%2001
Yellow-billed CuckooCuculidae42001+300%1998
Barn SwallowHirundinidae42025-55%2001
American RobinTurdidae42025-66%2001
Canyon TowheePasserellidae42007n/an/a
American KestrelFalconidae32023-72%2001
Brown-headed CowbirdIcteridae32023+180%2001
Loggerhead ShrikeLaniidae32023+60%2001
Northern House WrenTroglodytidae32023-42%2001
Ash-throated FlycatcherTyrannidae32023-30%2008
Blue-winged TealAnatidae22015+0%1998
Northern BobwhiteOdontophoridae22016-77%2001
Red-headed WoodpeckerPicidae22023-9%2007
Cassin's KingbirdTyrannidae22019-72%2002
Say's PhoebeTyrannidae22025+120%2002
Common RavenCorvidae22025-82%1998

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