BirdAnalyst
BBS Route · Colorado · BCR 18

Rush Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 62 species recorded across 33 survey years, still active.

62Species 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 →
33Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2024Span
11Observers

Bird Species Found on Colorado Rush

Top 40 of 62 species by most recent count. Each links to its species trend.

Species recorded on the Rush 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 MeadowlarkIcteridae1452024+30%1987
Horned LarkAlaudidae1432024-15%1987
Mourning DoveColumbidae842024+39%1987
Western KingbirdTyrannidae602024+64%1987
Cassin's SparrowPasserellidae442024+100%1990
House SparrowPasseridae432024+98%1987
Lark BuntingPasserellidae372024-43%1987
Cliff SwallowHirundinidae252017+550%1990
Rock PigeonColumbidae20202216×1994
Grasshopper SparrowPasserellidae152024+55%1990
European StarlingSturnidae132024+470%1990
Northern MockingbirdMimidae112024+173%1987
Eurasian Collared-DoveColumbidae102022+363%2010
Common GrackleIcteridae82024+70%1987
Loggerhead ShrikeLaniidae72022+36%1987
Common NighthawkCaprimulgidae62022+50%1991
Burrowing OwlStrigidae52024+150%1996
Say's PhoebeTyrannidae52024+83%1991
Bullock's OrioleIcteridae52024+63%1991
American RobinTurdidae52024+178%1991
Swainson's HawkAccipitridae42024-71%1987
American KestrelFalconidae42019+67%2000
KilldeerCharadriidae32024-33%1987
Scaled QuailOdontophoridae32022+100%1992
House FinchFringillidae32024+133%1987
Brewer's BlackbirdIcteridae32022-39%2001
Northern BobwhiteOdontophoridae32004n/an/a
Black-capped ChickadeeParidae32017n/an/a
Great-tailed GrackleIcteridae32024n/an/a
Red-tailed HawkAccipitridae22022+125%1994
American CrowCorvidae22003+0%1983
Long-billed CurlewScolopacidae21984n/an/a
Red-winged BlackbirdIcteridae22019+0%1998
Cassin's KingbirdTyrannidae22024-54%2002
Brown-headed CowbirdIcteridae22024+44%1993
Brewer's SparrowPasserellidae22022+50%1991
American AvocetRecurvirostridae21990n/an/a
Lark SparrowPasserellidae22024-46%1994
Ash-throated FlycatcherTyrannidae22014+100%1996
Blue-winged TealAnatidae22021n/an/a

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