BirdAnalyst
BBS Route · Iowa · BCR 22

Exline Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 107 species recorded across 51 survey years, still active.

107Species 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 →
51Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1974–2025Span
4Observers

Bird Species Found on Iowa Exline

Top 40 of 107 species by most recent count. Each links to its species trend.

Species recorded on the Exline 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 BlackbirdIcteridae1302025+86%1976
Cliff SwallowHirundinidae55202516×1990
Canada GooseAnatidae452025+135%1996
Mourning DoveColumbidae292025+32%1976
Turkey VultureCathartidae272025+557%1993
Common YellowthroatParulidae262025+0%1976
House SparrowPasseridae262025-50%1976
American RobinTurdidae262025+8%1976
American CrowCorvidae252025+133%1976
Eastern MeadowlarkIcteridae242025-45%1976
Purple MartinHirundinidae21202521×1976
DickcisselCardinalidae172025-35%1976
Brown-headed CowbirdIcteridae162025+15%1976
Barn SwallowHirundinidae152025+5%1976
Gray CatbirdMimidae142025+254%1976
European StarlingSturnidae132025-22%1976
Northern House WrenTroglodytidae132025+50%1976
Red-headed WoodpeckerPicidae122025-38%1976
Wild TurkeyPhasianidae122025+67%1989
Song SparrowPasserellidae112025+300%1979
Northern CardinalCardinalidae112025+411%1976
Indigo BuntingCardinalidae112025+20%1976
Eastern KingbirdTyrannidae102025+82%1976
American GoldfinchFringillidae102025+9%1977
Brown ThrasherMimidae102025-39%1976
Baltimore OrioleIcteridae92025+20%1978
Field SparrowPasserellidae92025-59%1976
Eastern BluebirdTurdidae92025+88%1986
MallardAnatidae92014+50%2004
Black TernLaridae82007n/an/a
Ring-necked PheasantPhasianidae72025+113%1976
BobolinkIcteridae72025+333%1984
Chipping SparrowPasserellidae72025+225%1998
KilldeerCharadriidae62025+55%1976
Eastern PhoebeTyrannidae62025+71%1981
Eastern Wood-PeweeTyrannidae62025+275%1980
Rose-breasted GrosbeakCardinalidae62025+50%1978
Bell's VireoVireonidae62025+120%1994
Blue JayCorvidae52025-24%1976
Savannah SparrowPasserellidae52006+167%1981

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