BirdAnalyst
BBS Route · Wisconsin · BCR 12

Weirgor Springs Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 118 species recorded across 21 survey years, still active.

118Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1999–2024Span
4Observers

Bird Species Found on Wisconsin Weirgor Springs

Top 40 of 118 species by most recent count. Each links to its species trend.

Species recorded on the Weirgor Springs 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
OvenbirdParulidae752024+76%2002
Red-eyed VireoVireonidae642024+91%2002
American CrowCorvidae612024+62%2002
VeeryTurdidae422024+365%2002
Red-winged BlackbirdIcteridae392024+50%2002
Common YellowthroatParulidae392024+63%2002
American RobinTurdidae392024+90%2002
Chestnut-sided WarblerParulidae352024+166%2002
Golden-winged WarblerParulidae322024+427%2003
Indigo BuntingCardinalidae302024+150%2002
Wood ThrushTurdidae302024+940%2003
Song SparrowPasserellidae272024+59%2002
Yellow WarblerParulidae242024+283%2002
Chipping SparrowPasserellidae192024+111%2002
Blue JayCorvidae182024+86%2002
BobolinkIcteridae172024+26%2002
Cedar WaxwingBombycillidae172024+130%2002
Sedge WrenTroglodytidae152024+313%2003
Alder FlycatcherTyrannidae142024+378%2002
Black-and-white WarblerParulidae142024+222%2002
Gray CatbirdMimidae142024+350%2002
American RedstartParulidae132024+150%2002
Cliff SwallowHirundinidae132023-15%2011
Least FlycatcherTyrannidae112024+367%2002
Eastern Wood-PeweeTyrannidae102024+163%2002
Black-capped ChickadeeParidae92024+75%2002
Rock PigeonColumbidae82024+100%2004
American GoldfinchFringillidae62024+11%2002
Mourning DoveColumbidae62024+14%2003
Common RavenCorvidae62024+125%2011
White-breasted NuthatchSittidae62024-68%2009
Yellow-bellied SapsuckerPicidae52023+460%2003
Eastern PhoebeTyrannidae52024-27%2002
Barn SwallowHirundinidae52024-56%2002
Pileated WoodpeckerPicidae52024+175%2011
Great Crested FlycatcherTyrannidae42024-27%2003
Savannah SparrowPasserellidae42024-56%2002
Rose-breasted GrosbeakCardinalidae42024+92%2003
Sandhill CraneGruidae42024+175%2004
Yellow-throated VireoVireonidae42024+100%2008

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