BirdAnalyst
BBS Route · Colorado · BCR 18

Fleming Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 71 species recorded across 42 survey years, still active.

71Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
8Observers

Bird Species Found on Colorado Fleming

Top 40 of 71 species by most recent count. Each links to its species trend.

Species recorded on the Fleming 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 MeadowlarkIcteridae1462025-50%1970
Horned LarkAlaudidae1322025-30%1970
Mourning DoveColumbidae1092025+43%1970
European StarlingSturnidae1022025+248%1970
Common GrackleIcteridae792025+171%1970
Red-winged BlackbirdIcteridae492025-35%1970
American RobinTurdidae41202515×1970
House SparrowPasseridae372025-95%1970
Ring-necked PheasantPhasianidae332025-91%1970
Western KingbirdTyrannidae232025-33%1970
Brewer's BlackbirdIcteridae222025+156%2015
Grasshopper SparrowPasserellidae162025-66%1970
American CrowCorvidae151999-74%1970
Eurasian Collared-DoveColumbidae142025+262%2012
Brown-headed CowbirdIcteridae132025+50%2005
Lark BuntingPasserellidae102025-79%1970
Great Blue HeronArdeidae92003+800%1992
Green-winged TealAnatidae82003+700%1973
Barn SwallowHirundinidae62025-57%1970
Upland SandpiperScolopacidae62006n/an/a
House FinchFringillidae52025+17%1973
Chimney SwiftApodidae42025+13%1970
Eastern BluebirdTurdidae42003+300%1970
Northern PintailAnatidae42003+50%1979
Wood DuckAnatidae42005+300%1977
KilldeerCharadriidae32025+17%1970
Burrowing OwlStrigidae32025-84%1970
Brown ThrasherMimidae32025+20%1970
Swainson's HawkAccipitridae32025-22%1975
Canada GooseAnatidae32014-49%1978
Short-eared OwlStrigidae32006+200%1980
Ring-billed GullLaridae31991n/an/a
Say's PhoebeTyrannidae32015+33%2012
Great-tailed GrackleIcteridae32023-42%2011
Spotted SandpiperScolopacidae32006n/an/a
MallardAnatidae22025-81%1970
GadwallAnatidae21985-40%1970
Rock PigeonColumbidae22024-59%1970
Red-tailed HawkAccipitridae22025-67%2004
American KestrelFalconidae22024+100%1981

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