BirdAnalyst
BBS Route · Illinois · BCR 22

Alden Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 81 species recorded across 4 survey years, still active.

81Species 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 →
4Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2019–2023Span
1Observers

Bird Species Found on Illinois Alden

Top 40 of 81 species by most recent count. Each links to its species trend.

Species recorded on the Alden 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 BlackbirdIcteridae1012023+3%2021
American RobinTurdidae992023+4%2021
European StarlingSturnidae632023-19%2021
Rock PigeonColumbidae542023+600%2021
American CrowCorvidae522023+98%2021
House SparrowPasseridae502023+15%2021
Canada GooseAnatidae372023+363%2019
Horned LarkAlaudidae352023-17%2021
Northern House WrenTroglodytidae342023+31%2021
Mourning DoveColumbidae332023+28%2021
Song SparrowPasserellidae322023-30%2021
Chipping SparrowPasserellidae262023-11%2021
Common YellowthroatParulidae252023-16%2021
KilldeerCharadriidae242023+11%2021
Brown-headed CowbirdIcteridae242023+2%2021
Indigo BuntingCardinalidae222023-15%2021
Northern CardinalCardinalidae212023-10%2021
Barn SwallowHirundinidae162023-37%2021
Gray CatbirdMimidae142023-23%2021
Blue JayCorvidae132023-16%2021
Cedar WaxwingBombycillidae112023-36%2021
Common GrackleIcteridae102023-63%2021
Chimney SwiftApodidae92023-54%2021
Warbling VireoVireonidae92023-37%2021
Ring-necked PheasantPhasianidae72019n/an/a
Savannah SparrowPasserellidae72023+13%2021
Yellow WarblerParulidae72023-47%2021
Black-capped ChickadeeParidae72023-8%2021
Eastern KingbirdTyrannidae62023-35%2021
Great Crested FlycatcherTyrannidae62023+17%2021
Eastern Wood-PeweeTyrannidae62023+10%2021
Eastern MeadowlarkIcteridae62023-27%2021
House FinchFringillidae62023+17%2021
Rose-breasted GrosbeakCardinalidae62023+40%2021
DickcisselCardinalidae62023+140%2021
Red-bellied WoodpeckerPicidae52023+0%2021
Willow FlycatcherTyrannidae52023+167%2021
Orchard OrioleIcteridae52023+60%2021
American GoldfinchFringillidae52023+13%2021
Vesper SparrowPasserellidae52023-9%2021

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