BirdAnalyst
BBS Route · Tennessee · BCR 24

Union Hill Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 55 survey years, still active.

104Species 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 →
55Years 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
5Observers

Bird Species Found on Tennessee Union Hill

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Union Hill 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
Indigo BuntingCardinalidae582024-39%1969
European StarlingSturnidae492024+1%1969
Mourning DoveColumbidae462024-24%1969
American CrowCorvidae432024-29%1969
Northern CardinalCardinalidae312024-19%1969
Eastern MeadowlarkIcteridae272024-59%1969
Carolina WrenTroglodytidae232024+100%1969
Chipping SparrowPasserellidae222024-35%1969
Red-bellied WoodpeckerPicidae212024+13%1969
Red-winged BlackbirdIcteridae202024+64%1969
Eastern BluebirdTurdidae182024+11%1969
Field SparrowPasserellidae162024-76%1969
American RobinTurdidae162024+18%1969
Northern MockingbirdMimidae152024-69%1969
Barn SwallowHirundinidae112024-79%1969
Blue GrosbeakCardinalidae112024+350%1971
Song SparrowPasserellidae112024+820%1984
Eastern Wood-PeweeTyrannidae102024+8%1969
Purple MartinHirundinidae102024+50%1969
Brown ThrasherMimidae102024+25%1969
Eastern PhoebeTyrannidae92024+30%1969
Brown-headed CowbirdIcteridae92024-38%1969
Eastern TowheePasserellidae92024-41%1969
Yellow-billed CuckooCuculidae82024-63%1969
Blue JayCorvidae82024-68%1969
White-eyed VireoVireonidae82024-13%1969
Common YellowthroatParulidae82024-31%1969
Carolina ChickadeeParidae82024+29%1969
Black VultureCathartidae82024+233%2012
White-breasted NuthatchSittidae72024+175%1976
Northern ParulaParulidae72024+600%1986
Canada GooseAnatidae72021+125%2003
Orchard OrioleIcteridae62024-56%1969
Red-eyed VireoVireonidae62024+17%1969
Tufted TitmouseParidae62024-19%1969
Blue-gray GnatcatcherPolioptilidae62024-23%1969
House SparrowPasseridae52024-84%1969
Red-headed WoodpeckerPicidae52023+333%1982
Eurasian Collared-DoveColumbidae52024+20%2021
Downy WoodpeckerPicidae42024-44%1969

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