BirdAnalyst
BBS Route · Missouri · BCR 22

Trenton 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 →
1967–2024Span
12Observers

Bird Species Found on Missouri Trenton

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

Species recorded on the Trenton 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 SwallowHirundinidae1032024+882%2007
Red-winged BlackbirdIcteridae602024-16%1969
Eastern MeadowlarkIcteridae572024-1%1969
DickcisselCardinalidae572024+49%1969
American RobinTurdidae462024+46%1969
Mourning DoveColumbidae322024+27%1969
Barn SwallowHirundinidae322024+41%1969
Northern CardinalCardinalidae302024+88%1969
Northern House WrenTroglodytidae292024+76%1969
Brown-headed CowbirdIcteridae272024+190%1969
American CrowCorvidae262024+240%1969
Northern BobwhiteOdontophoridae252024-60%1969
Turkey VultureCathartidae252024+350%1977
Orchard OrioleIcteridae232024+583%1975
Indigo BuntingCardinalidae212024+162%1972
Field SparrowPasserellidae202024+20%1969
Common YellowthroatParulidae202024+145%1969
Eastern KingbirdTyrannidae182024+72%1969
European StarlingSturnidae182024-77%1969
Purple MartinHirundinidae172024+733%1985
Red-headed WoodpeckerPicidae162024+100%1969
House SparrowPasseridae162024-80%1969
Blue JayCorvidae142024+21%1969
Rose-breasted GrosbeakCardinalidae142024+420%1969
Common GrackleIcteridae122024-66%1972
American GoldfinchFringillidae112024-49%1969
Gray CatbirdMimidae112024+37%1969
Brown ThrasherMimidae112024+10%1969
Eastern BluebirdTurdidae112024-5%1969
MallardAnatidae112021+175%2009
KilldeerCharadriidae82024+400%1972
Song SparrowPasserellidae82024+53%1975
Tufted TitmouseParidae82024+67%1972
Red-bellied WoodpeckerPicidae72024+144%1972
Eastern PhoebeTyrannidae72024+0%1976
Yellow-billed CuckooCuculidae62024+180%1969
BobolinkIcteridae62024-31%1976
Red-tailed HawkAccipitridae52024+14%1975
Eastern Wood-PeweeTyrannidae52024+300%1975
Eastern TowheePasserellidae52024+400%1969

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