BirdAnalyst
BBS Route · Wisconsin · BCR 23

Princeton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 125 species recorded across 56 survey years, still active.

125Species 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 →
56Years 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
3Observers

Bird Species Found on Wisconsin Princeton

Top 40 of 125 species by most recent count. Each links to its species trend.

Species recorded on the Princeton 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
American CrowCorvidae702024+65%1968
Mourning DoveColumbidae512024+1%1968
American RobinTurdidae352024+6%1968
Northern CardinalCardinalidae342024+514%1968
Red-winged BlackbirdIcteridae322024-74%1968
Sandhill CraneGruidae292024+612%1968
Red-eyed VireoVireonidae202024+240%1968
White-breasted NuthatchSittidae172024+29%1968
Song SparrowPasserellidae162024-65%1968
Gray CatbirdMimidae162024-13%1968
Indigo BuntingCardinalidae152024+80%1968
Wild TurkeyPhasianidae142024+286%1996
Blue JayCorvidae122024-69%1968
Common YellowthroatParulidae122024-15%1968
Barn SwallowHirundinidae112024-12%1968
VeeryTurdidae112024+126%1968
Tree SwallowHirundinidae102024+17%1968
OvenbirdParulidae92024+117%1968
Red-bellied WoodpeckerPicidae92024+900%1982
Chipping SparrowPasserellidae82024+50%1968
MallardAnatidae72019+67%1971
Canada GooseAnatidae72023+258%1985
Rose-breasted GrosbeakCardinalidae62024+271%1970
Northern House WrenTroglodytidae62024+143%1968
Eastern PhoebeTyrannidae52017+60%1968
Eastern TowheePasserellidae52024-29%1968
DickcisselCardinalidae52018-52%1968
Yellow-throated VireoVireonidae52024+375%1968
Brewer's BlackbirdIcteridae51993+400%1986
European StarlingSturnidae42023-94%1968
Baltimore OrioleIcteridae42023-46%1968
House SparrowPasseridae42024-90%1968
Eastern BluebirdTurdidae42024-9%1968
Black TernLaridae41980-46%1969
Great Horned OwlStrigidae42011+67%1984
Black-crowned Night HeronArdeidae41993n/an/a
Eastern Wood-PeweeTyrannidae32024+200%1969
Common GrackleIcteridae32023-86%1968
Field SparrowPasserellidae32024-77%1968
Yellow WarblerParulidae32024+120%1968

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