BirdAnalyst
BBS Route · Illinois · BCR 24

Belknap Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 54 survey years, still active.

108Species 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 →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2025Span
3Observers

Bird Species Found on Illinois Belknap

Top 40 of 108 species by most recent count. Each links to its species trend.

Species recorded on the Belknap 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
Northern CardinalCardinalidae1032025+79%1972
Indigo BuntingCardinalidae852025+146%1972
American CrowCorvidae702025+144%1972
Red-winged BlackbirdIcteridae642025-65%1972
Mourning DoveColumbidae512025-63%1972
Common YellowthroatParulidae502025+189%1972
Barn SwallowHirundinidae472025-56%1972
Carolina WrenTroglodytidae462025+778%1972
Tufted TitmouseParidae432025+230%1972
Cliff SwallowHirundinidae33202515×2000
White-eyed VireoVireonidae272025+357%1972
Eastern BluebirdTurdidae262025+125%1972
Carolina ChickadeeParidae252025+600%1972
Field SparrowPasserellidae242025+95%1972
Yellow-breasted ChatIcteriidae232025+97%1972
American RobinTurdidae162025-10%1972
Northern ParulaParulidae16202513×1992
Eastern MeadowlarkIcteridae152025-83%1972
House FinchFringillidae152025+286%1995
Purple MartinHirundinidae142025+150%1975
Red-bellied WoodpeckerPicidae132025-43%1972
Blue JayCorvidae132025-56%1972
Chipping SparrowPasserellidae122025+79%1972
Northern MockingbirdMimidae122025-79%1972
Turkey VultureCathartidae122025-45%1976
Fish CrowCorvidae122025+475%2005
European StarlingSturnidae112025-78%1972
White-breasted NuthatchSittidae112025+567%1975
Red-shouldered HawkAccipitridae102025+567%2004
Brown-headed CowbirdIcteridae92025+33%1972
Summer TanagerCardinalidae92025+380%1973
Little Blue HeronArdeidae92011n/an/a
Eastern Wood-PeweeTyrannidae82025-7%1972
American GoldfinchFringillidae82025+27%1973
KilldeerCharadriidae72025+22%1972
Warbling VireoVireonidae72025+225%1974
Northern BobwhiteOdontophoridae62024-91%1972
Eastern PhoebeTyrannidae62025+133%1972
Prairie WarblerParulidae62025+350%1983
Black VultureCathartidae62025+58%1978

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