BirdAnalyst
BBS Route · Missouri · BCR 22

Filley Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 41 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 →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2025Span
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
Barn SwallowHirundinidae822025+24%1977
American CrowCorvidae482025+13%1977
Cliff SwallowHirundinidae472025+947%1989
DickcisselCardinalidae452025-79%1977
Indigo BuntingCardinalidae372025-8%1977
Rock PigeonColumbidae362025+5%1977
Northern CardinalCardinalidae312025-29%1977
Mourning DoveColumbidae292025-26%1977
Red-bellied WoodpeckerPicidae282025+39%1977
Eastern MeadowlarkIcteridae282025-89%1977
Brown-headed CowbirdIcteridae252025-58%1977
Red-winged BlackbirdIcteridae232025-77%1977
Yellow-billed CuckooCuculidae192025-51%1977
Tufted TitmouseParidae192025+15%1977
Field SparrowPasserellidae182025-67%1977
Blue GrosbeakCardinalidae172025+27%1977
Black-capped ChickadeeParidae171994n/an/a
House SparrowPasseridae162025-92%1977
Eastern BluebirdTurdidae152025+71%1977
Eastern Wood-PeweeTyrannidae142025-16%1977
Blue JayCorvidae142025-40%1977
Northern MockingbirdMimidae142025-80%1977
Turkey VultureCathartidae142025+400%1978
Summer TanagerCardinalidae132025+400%1977
Carolina WrenTroglodytidae112025+10%1977
Eastern KingbirdTyrannidae102025-64%1977
Common GrackleIcteridae92025-88%1977
Northern BobwhiteOdontophoridae82025-90%1977
Yellow-breasted ChatIcteriidae82025+60%1978
Great Crested FlycatcherTyrannidae72025-54%1977
Northern ParulaParulidae72025+67%1977
Blue-gray GnatcatcherPolioptilidae72025-29%1977
Red-tailed HawkAccipitridae62025+200%1977
Downy WoodpeckerPicidae62025-17%1977
Common YellowthroatParulidae62025-55%1977
Brown ThrasherMimidae62025-67%1977
Red-eyed VireoVireonidae62025+63%1979
Great Blue HeronArdeidae52024+29%1979
Baltimore OrioleIcteridae52025+0%1977
Kentucky WarblerParulidae52025+57%1977

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