BirdAnalyst
BBS Route · Colorado · BCR 18

Rush Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 67 species recorded across 34 survey years, still active.

67Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2025Span
11Observers

Bird Species Found on Colorado Rush

Top 40 of 67 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
Horned LarkAlaudidae2752025-27%1987
Lark BuntingPasserellidae2702025-50%1987
Western MeadowlarkIcteridae1222025+29%1987
Mourning DoveColumbidae622025+18%1987
House SparrowPasseridae562025+97%1987
Western KingbirdTyrannidae312025+50%1987
Cassin's SparrowPasserellidae252025+98%1990
Cliff SwallowHirundinidae252017+550%1990
Grasshopper SparrowPasserellidae192025+90%1990
DickcisselCardinalidae122025n/an/a
Eurasian Collared-DoveColumbidae112025+388%2010
House FinchFringillidae102025+167%1987
Rock PigeonColumbidae9202513×1994
Common GrackleIcteridae82024+70%1987
Northern MockingbirdMimidae82025+109%1987
Burrowing OwlStrigidae62025+225%1996
Brewer's BlackbirdIcteridae52025-44%2001
KilldeerCharadriidae42025-50%1987
Swainson's HawkAccipitridae42024-71%1987
American KestrelFalconidae42019+67%2000
Say's PhoebeTyrannidae42025+100%1991
Cassin's KingbirdTyrannidae42025-31%2002
Scaled QuailOdontophoridae32022+100%1992
European StarlingSturnidae32025+170%1990
Northern BobwhiteOdontophoridae32004n/an/a
Black-capped ChickadeeParidae32017n/an/a
Great-tailed GrackleIcteridae32024n/an/a
Red-tailed HawkAccipitridae22025+100%1994
American CrowCorvidae22003+0%1983
Bullock's OrioleIcteridae22025+0%1991
Loggerhead ShrikeLaniidae22025+0%1987
American RobinTurdidae22025+144%1991
Long-billed CurlewScolopacidae21984n/an/a
Common NighthawkCaprimulgidae22025-14%1991
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 2026-08-14. A route is a sample, not a census.