BirdAnalyst
BBS Route · Missouri · BCR 22

Bolckow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 21 survey years, no longer active.

85Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–1992Span
3Observers

Bird Species Found on Missouri Bolckow

Top 40 of 85 species by most recent count. Each links to its species trend.

Species recorded on the Bolckow 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
Red-winged BlackbirdIcteridae1011992-15%1969
House SparrowPasseridae811992-34%1969
Northern BobwhiteOdontophoridae651992-6%1969
Western MeadowlarkIcteridae501992-7%1969
DickcisselCardinalidae501992-22%1969
Mourning DoveColumbidae491992-25%1969
American RobinTurdidae331992+44%1969
Brown-headed CowbirdIcteridae291992+67%1969
Barn SwallowHirundinidae251992-19%1969
Blue JayCorvidae241992-11%1969
European StarlingSturnidae241992-67%1969
Turkey VultureCathartidae221990+360%1973
Northern CardinalCardinalidae201992-34%1969
KilldeerCharadriidae161992+225%1969
Indigo BuntingCardinalidae161992+58%1969
Common GrackleIcteridae131992-63%1969
Northern House WrenTroglodytidae131992-26%1969
Eastern KingbirdTyrannidae121992+7%1969
Common YellowthroatParulidae121992-49%1969
American GoldfinchFringillidae111992-74%1969
Song SparrowPasserellidae111992+200%1971
Brown ThrasherMimidae111992-26%1969
Eastern BluebirdTurdidae111992+6%1969
Ring-necked PheasantPhasianidae101992+700%1969
Eastern MeadowlarkIcteridae101992-56%1969
Grasshopper SparrowPasserellidae91992+72%1969
Red-bellied WoodpeckerPicidae91992+27%1970
Loggerhead ShrikeLaniidae81992-53%1969
American CrowCorvidae71992-86%1969
Northern Rough-winged SwallowHirundinidae71987+33%1970
White-breasted NuthatchSittidae71992+13%1974
Black-capped ChickadeeParidae71992-24%1969
Red-tailed HawkAccipitridae61992+0%1970
Tufted TitmouseParidae61992-15%1970
Yellow-billed CuckooCuculidae51992-33%1969
Red-headed WoodpeckerPicidae41992-29%1969
Chimney SwiftApodidae41992-63%1969
Eastern PhoebeTyrannidae41992+0%1969
Eastern Wood-PeweeTyrannidae41992-36%1969
Rose-breasted GrosbeakCardinalidae41987-36%1969

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