BirdAnalyst
BBS Route · South Dakota · BCR 11

Forbes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 32 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2025Span
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 BlackbirdIcteridae5432025+142%1969
Yellow-headed BlackbirdIcteridae1822025+719%1969
Brown-headed CowbirdIcteridae1022025+166%1969
Cliff SwallowHirundinidae842025+460%1977
Ring-necked PheasantPhasianidae79202528×1969
Common GrackleIcteridae692025+83%1969
Mourning DoveColumbidae682025+123%1969
Western MeadowlarkIcteridae622025-45%1969
Lark BuntingPasserellidae531984-44%1969
Marsh WrenTroglodytidae452025+960%1984
House SparrowPasseridae342025+343%1970
Franklin's GullLaridae312025+909%1969
KilldeerCharadriidae302025+159%1969
American RobinTurdidae252025+425%1971
Common YellowthroatParulidae232025+130%1979
European StarlingSturnidae212025-56%1978
Grasshopper SparrowPasserellidae202025+64%1978
Song SparrowPasserellidae202025+613%1969
Northern ShovelerAnatidae182024+450%1977
DickcisselCardinalidae182025+62%1969
Brewer's BlackbirdIcteridae152024+35%2012
BobolinkIcteridae142025+17%1969
Barn SwallowHirundinidae132025+71%1969
American CootRallidae112024+108%1969
Eastern KingbirdTyrannidae112025+47%1969
Chestnut-collared LongspurCalcariidae112012-84%1978
MallardAnatidae102025+133%1969
Blue-winged TealAnatidae102025+133%1969
RedheadAnatidae102024+35%1979
Rock PigeonColumbidae82025+143%1978
Yellow WarblerParulidae7202513×1978
Vesper SparrowPasserellidae72025-35%1979
Ring-billed GullLaridae72024+280%2012
American White PelicanPelecanidae62025-91%1969
WilletScolopacidae62009+175%1970
Upland SandpiperScolopacidae62025+238%1971
Gray PartridgePhasianidae61986-8%1981
Double-crested CormorantPhalacrocoracidae62025+63%1983
Lesser ScaupAnatidae62015+500%1979
Canada GooseAnatidae62024+440%2015

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