BirdAnalyst
BBS Route · Missouri · BCR 22

Filley Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 40 survey years, still active.

111Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2024Span
7Observers

Bird Species Found on Missouri Filley

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Filley 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
Cliff SwallowHirundinidae1022024+953%1989
DickcisselCardinalidae462024-79%1977
American CrowCorvidae452024+27%1977
Northern CardinalCardinalidae422024-15%1977
Mourning DoveColumbidae392024-30%1977
Indigo BuntingCardinalidae352024-1%1977
Red-bellied WoodpeckerPicidae332024+35%1977
Barn SwallowHirundinidae302024-11%1977
Brown-headed CowbirdIcteridae292024-52%1977
Eastern MeadowlarkIcteridae282024-87%1977
Blue GrosbeakCardinalidae202024+31%1977
Tufted TitmouseParidae202024+32%1977
Field SparrowPasserellidae192024-66%1977
Yellow-billed CuckooCuculidae182024-43%1977
European StarlingSturnidae182024+61%1977
Summer TanagerCardinalidae172024+430%1977
Black-capped ChickadeeParidae171994n/an/a
Blue JayCorvidae152024-31%1977
Eastern Wood-PeweeTyrannidae142024-2%1977
Red-winged BlackbirdIcteridae142024-85%1977
Great Crested FlycatcherTyrannidae122024-43%1977
Eastern PhoebeTyrannidae122024+47%1977
Northern MockingbirdMimidae122024-84%1977
Blue-gray GnatcatcherPolioptilidae112024-26%1977
Northern BobwhiteOdontophoridae92024-91%1977
Eastern BluebirdTurdidae92024+71%1977
House SparrowPasseridae82024-95%1977
White-breasted NuthatchSittidae82024-44%1978
Red-tailed HawkAccipitridae72023+120%1977
Northern ParulaParulidae72024+33%1977
Wild TurkeyPhasianidae72024+200%1988
Common GrackleIcteridae62024-91%1977
Fish CrowCorvidae62024+180%2017
Great Blue HeronArdeidae52024+29%1979
Orchard OrioleIcteridae52024-52%1977
Carolina ChickadeeParidae52024-62%1977
Turkey VultureCathartidae52024+460%1978
Canada GooseAnatidae52024+211%2010
Western Cattle-EgretArdeidae52013n/an/a
Rock PigeonColumbidae42024-75%1977

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