BirdAnalyst
BBS Route · Iowa · BCR 11

Garner Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 89 species recorded across 22 survey years, no longer active.

89Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–1993Span
6Observers

Bird Species Found on Iowa Garner

Top 40 of 89 species by most recent count. Each links to its species trend.

Species recorded on the Garner 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 BlackbirdIcteridae1551993+90%1974
House SparrowPasseridae901993+58%1974
Common GrackleIcteridae851993+6%1974
European StarlingSturnidae611993+28%1974
Song SparrowPasserellidae281993+1%1974
American CrowCorvidae181993-54%1974
Yellow-headed BlackbirdIcteridae181992+286%1975
American RobinTurdidae171993+33%1974
Ring-necked PheasantPhasianidae151993-70%1974
Rock PigeonColumbidae141993-60%1974
Brown-headed CowbirdIcteridae91993-44%1974
Western MeadowlarkIcteridae91993-91%1974
Chipping SparrowPasserellidae91993+78%1976
Horned LarkAlaudidae81993-54%1974
Vesper SparrowPasserellidae81993-37%1974
Gray PartridgePhasianidae81990+125%1975
Ring-billed GullLaridae81992+700%1983
KilldeerCharadriidae71993+0%1974
Barn SwallowHirundinidae71993-12%1974
MallardAnatidae71993-15%1975
Mourning DoveColumbidae61993-17%1974
American GoldfinchFringillidae61993-9%1974
Grasshopper SparrowPasserellidae51990-59%1974
Great Crested FlycatcherTyrannidae51993+80%1978
Black-crowned Night HeronArdeidae41971n/an/a
DickcisselCardinalidae41993-71%1974
Savannah SparrowPasserellidae41993+0%1985
Field SparrowPasserellidae41992+300%1973
House FinchFringillidae41993+300%1991
Black TernLaridae31977+0%1971
American KestrelFalconidae31993+0%1974
Common YellowthroatParulidae31993-79%1974
Northern BobwhiteOdontophoridae31974n/an/a
Red-headed WoodpeckerPicidae21993-75%1974
Eastern KingbirdTyrannidae21993-24%1974
Brown ThrasherMimidae21993-50%1974
Northern House WrenTroglodytidae21993-65%1974
Sedge WrenTroglodytidae21988+50%1976
Green-winged TealAnatidae21973n/an/a
Northern ShovelerAnatidae21978+100%1973

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