BirdAnalyst
BBS Route · Illinois · BCR 24

Beaverdam Lk Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 50 survey years, still active.

110Species 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 →
50Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2023Span
3Observers

Bird Species Found on Illinois Beaverdam Lk

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Beaverdam Lk 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
Indigo BuntingCardinalidae922023+20%1972
American CrowCorvidae712023+9%1972
Cliff SwallowHirundinidae692023+700%1982
Northern CardinalCardinalidae492023-19%1972
Common YellowthroatParulidae382023+26%1972
Tufted TitmouseParidae332023+25%1972
Field SparrowPasserellidae312023-10%1972
Brown-headed CowbirdIcteridae292023+34%1972
Red-winged BlackbirdIcteridae272023-58%1972
European StarlingSturnidae242023-89%1972
White-eyed VireoVireonidae232023+238%1972
Barn SwallowHirundinidae222023-69%1972
Yellow-breasted ChatIcteriidae212023-29%1972
Mourning DoveColumbidae202023-59%1972
Northern ParulaParulidae192023+720%1978
Blue-gray GnatcatcherPolioptilidae192023+786%1974
Eastern Wood-PeweeTyrannidae162023-3%1972
Blue GrosbeakCardinalidae152023+300%1972
Great Crested FlycatcherTyrannidae142023+42%1972
American GoldfinchFringillidae142023+21%1972
Red-shouldered HawkAccipitridae132023+560%1974
Chipping SparrowPasserellidae132023+386%1972
Summer TanagerCardinalidae132023+113%1972
Eastern PhoebeTyrannidae112023+69%1972
Carolina WrenTroglodytidae112023-10%1972
Turkey VultureCathartidae102023+311%1975
Yellow-billed CuckooCuculidae92023-45%1972
Downy WoodpeckerPicidae82023+46%1974
Acadian FlycatcherTyrannidae82023+32%1972
DickcisselCardinalidae82023+192%1972
Red-bellied WoodpeckerPicidae72023-31%1972
Eastern KingbirdTyrannidae72023-41%1972
Prothonotary WarblerParulidae72023+340%1974
House SparrowPasseridae72023-86%1972
Eastern BluebirdTurdidae72023-59%1972
Black VultureCathartidae72023+567%2004
Blue JayCorvidae62023-45%1972
Yellow-throated VireoVireonidae62023+9%1972
MallardAnatidae61998+17%1986
Hooded MerganserAnatidae51995+400%1970

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