BirdAnalyst
BBS Route · Wisconsin · BCR 23

Elderon Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 131 species recorded across 57 survey years, still active.

131Species 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 →
57Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2024Span
6Observers

Bird Species Found on Wisconsin Elderon

Top 40 of 131 species by most recent count. Each links to its species trend.

Species recorded on the Elderon 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
Tree SwallowHirundinidae92023+50%1971
Sandhill CraneGruidae92024+150%1984
European StarlingSturnidae62024-89%1968
Brown-headed CowbirdIcteridae62024-81%1968
Yellow-headed BlackbirdIcteridae61981n/an/a
Bank SwallowHirundinidae52012+0%1968
Canada GooseAnatidae52024-10%1992
Wild TurkeyPhasianidae52024+400%2001
MallardAnatidae42024+75%1968
Blue JayCorvidae42024-56%1968
Red-winged BlackbirdIcteridae42024-96%1968
Cliff SwallowHirundinidae42010-52%1968
Northern Rough-winged SwallowHirundinidae41998+22%1972
Ruffed GrousePhasianidae41979n/an/a
Great Blue HeronArdeidae32024+133%1977
Mourning DoveColumbidae32024-15%1968
Chimney SwiftApodidae32014-16%1969
Eastern PhoebeTyrannidae32024+0%1968
BobolinkIcteridae32016-36%1968
Brewer's BlackbirdIcteridae32011-56%1971
Barn SwallowHirundinidae32023-77%1968
Cedar WaxwingBombycillidae32024+100%1969
Northern House WrenTroglodytidae32024+50%1971
American RedstartParulidae32024+100%1977
Yellow-throated VireoVireonidae32023+100%1981
American BitternArdeidae32016+67%1983
American Black DuckAnatidae32009n/an/a
Hooded MerganserAnatidae32023n/an/a
Black TernLaridae22001-73%1968
Ring-necked DuckAnatidae21976-20%1969
Rock PigeonColumbidae22024-88%1968
Red-tailed HawkAccipitridae22024+0%1984
American KestrelFalconidae22024+0%1971
Great Crested FlycatcherTyrannidae22022-14%1968
Common GrackleIcteridae22024-71%1968
American GoldfinchFringillidae22024-19%1968
Savannah SparrowPasserellidae22024-70%1968
Scarlet TanagerCardinalidae22024-30%1968
Purple MartinHirundinidae22010-60%1968
Gray CatbirdMimidae22023-33%1968

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