BirdAnalyst
BBS Route · South Dakota · BCR 11

Forbes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 31 survey years, still active.

113Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2024Span
10Observers

Bird Species Found on South Dakota Forbes

Top 40 of 113 species by most recent count. Each links to its species trend.

Species recorded on the Forbes 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 BlackbirdIcteridae5122024+139%1969
Yellow-headed BlackbirdIcteridae1832024+636%1969
Ring-necked PheasantPhasianidae111202425×1969
Cliff SwallowHirundinidae1092024+605%1977
Common GrackleIcteridae1002024+82%1969
Brown-headed CowbirdIcteridae972024+118%1969
Western MeadowlarkIcteridae932024-44%1969
Mourning DoveColumbidae782024+111%1969
House SparrowPasseridae542024+457%1970
Lark BuntingPasserellidae531984-44%1969
Blue-winged TealAnatidae342024+167%1969
KilldeerCharadriidae272024+152%1969
Song SparrowPasserellidae232024+538%1969
Ruddy DuckAnatidae212021+467%2007
Barn SwallowHirundinidae202024+93%1969
Northern PintailAnatidae192023+206%1969
Marsh WrenTroglodytidae192024+730%1984
MallardAnatidae182024+222%1969
Northern ShovelerAnatidae182024+450%1977
Eastern KingbirdTyrannidae182024+28%1969
American RobinTurdidae182024+367%1971
European StarlingSturnidae182024-73%1978
Common YellowthroatParulidae182024+122%1979
Savannah SparrowPasserellidae162024-23%1978
Brewer's BlackbirdIcteridae152024+35%2012
Black TernLaridae112023+36%1969
GadwallAnatidae112024+342%1969
American CootRallidae112024+108%1969
Upland SandpiperScolopacidae112024+213%1971
Chestnut-collared LongspurCalcariidae112012-84%1978
Yellow WarblerParulidae11202414×1978
RedheadAnatidae102024+35%1979
American GoldfinchFringillidae102024+220%1969
Grasshopper SparrowPasserellidae102024+0%1978
Northern House WrenTroglodytidae102024+150%1978
BobolinkIcteridae92024-8%1969
Franklin's GullLaridae7202414×1969
Ring-billed GullLaridae72024+280%2012
WilletScolopacidae62009+175%1970
Gray PartridgePhasianidae61986-8%1981

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