BirdAnalyst
BBS Route · North Dakota · BCR 11

Denbigh Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 145 species recorded across 54 survey years, still active.

145Species 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 →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2024Span
2Observers

Bird Species Found on North Dakota Denbigh

Top 40 of 145 species by most recent count. Each links to its species trend.

Species recorded on the Denbigh 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 BlackbirdIcteridae2252024+314%1970
Western MeadowlarkIcteridae1802024+45%1970
Brown-headed CowbirdIcteridae1362024+245%1970
Common GrackleIcteridae1272024+633%1970
Brewer's BlackbirdIcteridae822024+778%1970
Franklin's GullLaridae602024-69%1973
Eastern KingbirdTyrannidae592024+316%1970
Yellow-headed BlackbirdIcteridae522024+445%1970
Mourning DoveColumbidae502024+90%1970
MallardAnatidae492024+63%1971
European StarlingSturnidae462024+205%1970
Canada GooseAnatidae46202414×1996
Northern House WrenTroglodytidae432024+189%1970
Vesper SparrowPasserellidae402024+0%1970
Yellow WarblerParulidae362024+229%1970
American RobinTurdidae362024+482%1970
Ring-necked PheasantPhasianidae362024+778%1971
Western KingbirdTyrannidae342024-30%1970
Least FlycatcherTyrannidae312024+185%1970
BobolinkIcteridae252024+200%1970
Savannah SparrowPasserellidae232024+121%1970
Clay-colored SparrowPasserellidae222024-34%1970
Lark SparrowPasserellidae21202413×1986
Horned LarkAlaudidae202024-56%1970
Warbling VireoVireonidae192024+464%1970
Common YellowthroatParulidae182024+319%1970
Black TernLaridae152024-38%1970
Barn SwallowHirundinidae132024+56%1970
Marbled GodwitScolopacidae102024+143%1971
Grasshopper SparrowPasserellidae102024-30%1970
House SparrowPasseridae102024-58%1970
RedheadAnatidae102024+420%1996
Chipping SparrowPasserellidae102024+700%1973
Upland SandpiperScolopacidae92024-28%1970
Orchard OrioleIcteridae9202411×1971
Tree SwallowHirundinidae92024+357%1974
Bank SwallowHirundinidae92024-63%1973
Baltimore OrioleIcteridae82024+0%1970
Wilson's SnipeScolopacidae82024+26%1973
Lesser ScaupAnatidae82024+33%1988

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