BirdAnalyst
BBS Route · Iowa · BCR 22

Davis Corner Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 96 species recorded across 40 survey years, still active.

96Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
10Observers

Bird Species Found on Iowa Davis Corner

Top 40 of 96 species by most recent count. Each links to its species trend.

Species recorded on the Davis Corner 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 BlackbirdIcteridae3282025+360%1970
American RobinTurdidae972025+287%1970
KilldeerCharadriidae622025+330%1970
Common GrackleIcteridae512025-65%1970
Song SparrowPasserellidae422025+318%1970
Brown-headed CowbirdIcteridae342025+350%1970
Mourning DoveColumbidae322025+134%1970
House SparrowPasseridae322025-8%1970
Barn SwallowHirundinidae312025+255%1970
Common YellowthroatParulidae302025+87%1970
Northern House WrenTroglodytidae252025+221%1970
Ring-necked PheasantPhasianidae242025-25%1970
DickcisselCardinalidae242025+53%1970
American CrowCorvidae202025-14%1970
European StarlingSturnidae172025-25%1970
Northern Rough-winged SwallowHirundinidae122003+50%1977
Horned LarkAlaudidae112025-20%1970
Chipping SparrowPasserellidae112025+967%1974
American GoldfinchFringillidae102025+69%1970
Rock PigeonColumbidae92025-77%1970
Northern CardinalCardinalidae92025+667%1972
Blue JayCorvidae82025+29%1970
Sedge WrenTroglodytidae82025+111%1972
BobolinkIcteridae72025-80%1970
Eurasian Collared-DoveColumbidae72025+450%2017
Purple MartinHirundinidae61988+167%1971
Gray CatbirdMimidae62025+200%1971
Brown ThrasherMimidae62025+64%1971
Cedar WaxwingBombycillidae52025-57%1985
House FinchFringillidae52025+40%2017
Indigo BuntingCardinalidae42025+367%1971
Red-headed WoodpeckerPicidae32025-29%1970
Great Crested FlycatcherTyrannidae32025-17%1971
Red-bellied WoodpeckerPicidae32025+200%1981
Green HeronArdeidae32005+67%1980
Tree SwallowHirundinidae32025+233%1992
Yellow WarblerParulidae32023+67%1989
MallardAnatidae32005+50%1990
Bald EagleAccipitridae32025+100%2022
Great Blue HeronArdeidae22025+0%1983

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