BirdAnalyst
BBS Route · Missouri · BCR 22

Union Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 10 survey years, no longer active.

93Species 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 →
10Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1990–1999Span
1Observers

Bird Species Found on Missouri Union

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Union 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
Northern CardinalCardinalidae471999-29%1992
American CrowCorvidae361999+1%1992
Indigo BuntingCardinalidae361999+2%1992
Barn SwallowHirundinidae271999+16%1992
Blue JayCorvidae251999-40%1992
American RobinTurdidae251999-26%1992
Mourning DoveColumbidae211999-3%1992
Eastern Wood-PeweeTyrannidae201999+3%1992
Red-winged BlackbirdIcteridae191999-52%1992
Field SparrowPasserellidae191999-23%1992
Eastern MeadowlarkIcteridae161999-35%1992
Common GrackleIcteridae141999-41%1992
Northern House WrenTroglodytidae141999+167%1992
White-breasted NuthatchSittidae141999+0%1992
Brown-headed CowbirdIcteridae131999-31%1992
Purple MartinHirundinidae131999-19%1992
Tufted TitmouseParidae131999-40%1992
Chipping SparrowPasserellidae121999-33%1992
Summer TanagerCardinalidae111999+0%1992
Eastern PhoebeTyrannidae101999+7%1992
Carolina WrenTroglodytidae101999-40%1992
Chimney SwiftApodidae91999-40%1992
Yellow-breasted ChatIcteriidae91999+54%1992
Cedar WaxwingBombycillidae91998n/an/a
White-eyed VireoVireonidae81999+200%1992
Eastern BluebirdTurdidae81999-26%1992
Red-bellied WoodpeckerPicidae71999-50%1992
Eastern KingbirdTyrannidae71999-44%1992
European StarlingSturnidae71999-20%1992
Eastern TowheePasserellidae71999-47%1992
Common YellowthroatParulidae71999-34%1992
American GoldfinchFringillidae61999+50%1992
Brown ThrasherMimidae61999-19%1992
Yellow-billed CuckooCuculidae51999+88%1992
DickcisselCardinalidae51999+189%1992
Kentucky WarblerParulidae51999+36%1992
Red-eyed VireoVireonidae51999+50%1993
Red-shouldered HawkAccipitridae51999+200%1993
Wood ThrushTurdidae51999+100%1994
Downy WoodpeckerPicidae41999-33%1992

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