BirdAnalyst
BBS Route · Wisconsin · BCR 23

Hazel Green Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 105 species recorded across 51 survey years, still active.

105Species 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 →
51Years 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
9Observers

Bird Species Found on Wisconsin Hazel Green

Top 40 of 105 species by most recent count. Each links to its species trend.

Species recorded on the Hazel Green 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 BlackbirdIcteridae2822024-29%1969
American RobinTurdidae1052024+100%1969
House SparrowPasseridae752024-70%1969
Barn SwallowHirundinidae502024+98%1969
Cliff SwallowHirundinidae492024+600%1976
Mourning DoveColumbidae482024+60%1969
Song SparrowPasserellidae432024+59%1969
Common GrackleIcteridae342024-83%1969
European StarlingSturnidae322024-68%1969
Brown-headed CowbirdIcteridae302024-36%1969
American CrowCorvidae262024+21%1969
Northern House WrenTroglodytidae262024+20%1969
American GoldfinchFringillidae252024-36%1969
KilldeerCharadriidae232024+608%1970
Eastern MeadowlarkIcteridae202024-59%1969
Northern CardinalCardinalidae202024+70%1969
Horned LarkAlaudidae182024-32%1969
Gray CatbirdMimidae182024+11%1969
DickcisselCardinalidae172024-69%1969
Baltimore OrioleIcteridae152024+236%1969
Turkey VultureCathartidae122024+122%2013
Eastern KingbirdTyrannidae112024+182%1971
Warbling VireoVireonidae102024+443%1970
Common YellowthroatParulidae102024-51%1969
Rock PigeonColumbidae92024-84%1969
Red-bellied WoodpeckerPicidae92024+500%1978
Indigo BuntingCardinalidae92024+386%1970
Chipping SparrowPasserellidae82024-26%1970
Eastern BluebirdTurdidae82024+114%1972
Eastern Wood-PeweeTyrannidae72024+320%1969
Northern Rough-winged SwallowHirundinidae72018+229%1970
Rose-breasted GrosbeakCardinalidae62024+114%1969
Red-headed WoodpeckerPicidae52024-59%1969
Tufted TitmouseParidae52006+80%1973
Yellow WarblerParulidae52024+63%1987
Great Crested FlycatcherTyrannidae42024-10%1970
BobolinkIcteridae42024-89%1969
Brown ThrasherMimidae42024-48%1969
Blue JayCorvidae32024-44%1969
Field SparrowPasserellidae32024-78%1969

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