BirdAnalyst
BBS Route · Wisconsin · BCR 12

Weirgor Springs Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 119 species recorded across 22 survey years, still active.

119Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1999–2025Span
4Observers

Bird Species Found on Wisconsin Weirgor Springs

Top 40 of 119 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
OvenbirdParulidae622025+88%2002
Red-eyed VireoVireonidae562025+95%2002
Common YellowthroatParulidae492025+89%2002
Song SparrowPasserellidae392025+76%2002
VeeryTurdidae382025+444%2002
American CrowCorvidae352025+90%2002
Red-winged BlackbirdIcteridae332025+51%2002
Wood ThrushTurdidae33202515×2003
American RobinTurdidae272025+68%2002
Blue JayCorvidae222025+159%2002
Indigo BuntingCardinalidae222025+147%2002
Yellow WarblerParulidae202025+350%2002
Chestnut-sided WarblerParulidae202025+166%2002
Gray CatbirdMimidae202025+463%2002
Chipping SparrowPasserellidae182025+179%2002
Common RavenCorvidae162025+208%2011
Golden-winged WarblerParulidae132025+473%2003
Cliff SwallowHirundinidae132023-15%2011
Rose-breasted GrosbeakCardinalidae122025+133%2003
American RedstartParulidae122025+193%2002
Eastern PhoebeTyrannidae112025+27%2002
Mourning DoveColumbidae112025+29%2003
Least FlycatcherTyrannidae102025+400%2002
Swamp SparrowPasserellidae102025+183%2002
Black-and-white WarblerParulidae102025+278%2002
American GoldfinchFringillidae92025+17%2002
Barn SwallowHirundinidae92025-52%2002
Cedar WaxwingBombycillidae92025+180%2002
Rock PigeonColumbidae82024+100%2004
Eastern Wood-PeweeTyrannidae82025+238%2002
Alder FlycatcherTyrannidae82025+233%2002
Sedge WrenTroglodytidae82025+300%2003
Turkey VultureCathartidae72025+100%2012
White-breasted NuthatchSittidae62024-68%2009
Northern House WrenTroglodytidae52025+10%2002
Hermit ThrushTurdidae52025-33%2002
Yellow-throated VireoVireonidae52025+233%2008
Pileated WoodpeckerPicidae52024+175%2011
Red-bellied WoodpeckerPicidae52025+300%2017
Yellow-bellied SapsuckerPicidae42025+400%2003

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.