BirdAnalyst
BBS Route · Illinois · BCR 22

Janesville Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 98 species recorded across 45 survey years, still active.

98Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2025Span
9Observers

Bird Species Found on Illinois Janesville

Top 40 of 98 species by most recent count. Each links to its species trend.

Species recorded on the Janesville 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 BlackbirdIcteridae1392025+1%1974
European StarlingSturnidae752025+10%1974
Song SparrowPasserellidae482025+221%1974
House SparrowPasseridae482025-62%1974
American RobinTurdidae452025+167%1974
Mourning DoveColumbidae422025+51%1974
Barn SwallowHirundinidae402025+57%1974
DickcisselCardinalidae372025+148%1974
Common YellowthroatParulidae372025+296%1974
American CrowCorvidae362025+456%1974
KilldeerCharadriidae36202530×1977
Indigo BuntingCardinalidae332025+97%1974
Canada GooseAnatidae292025+510%2005
Brown-headed CowbirdIcteridae27202513×1974
Northern CardinalCardinalidae262025+157%1974
Eastern MeadowlarkIcteridae202025-70%1974
Common GrackleIcteridae192025-87%1974
Northern House WrenTroglodytidae182025+470%1977
Turkey VultureCathartidae172025+800%1991
House FinchFringillidae172025+500%1996
Purple MartinHirundinidae162025+560%2000
Blue GrosbeakCardinalidae122025+867%2012
Field SparrowPasserellidae102025-34%1974
Chipping SparrowPasserellidae10202511×1983
Northern BobwhiteOdontophoridae92025-82%1974
Eastern Wood-PeweeTyrannidae92025+240%1976
Cliff SwallowHirundinidae92025+67%2000
Red-headed WoodpeckerPicidae82025-38%1974
Horned LarkAlaudidae82025-77%1974
American GoldfinchFringillidae82025+413%1975
Red-bellied WoodpeckerPicidae72025+80%1974
Warbling VireoVireonidae72025+214%1976
Tree SwallowHirundinidae72025+142%2012
Eastern KingbirdTyrannidae52025+130%1974
Gray CatbirdMimidae52025+188%1974
Tufted TitmouseParidae52025+25%1974
Wood ThrushTurdidae52024+50%1980
Blue JayCorvidae42025-38%1974
Orchard OrioleIcteridae42025+33%1983
Eastern PhoebeTyrannidae42025+233%1983

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