BirdAnalyst
BBS Route · North Dakota · BCR 11

Denbigh Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 145 species recorded across 55 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 →
55Years 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
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 BlackbirdIcteridae2862025+257%1970
Western MeadowlarkIcteridae2302025+61%1970
Common GrackleIcteridae1452025+634%1970
Brown-headed CowbirdIcteridae1252025+200%1970
Franklin's GullLaridae1142025-21%1973
Yellow-headed BlackbirdIcteridae872025+350%1970
Brewer's BlackbirdIcteridae622025+944%1970
Ring-necked PheasantPhasianidae60202513×1971
Yellow WarblerParulidae562025+255%1970
Northern House WrenTroglodytidae562025+246%1970
Mourning DoveColumbidae542025+74%1970
Eastern KingbirdTyrannidae542025+278%1970
Vesper SparrowPasserellidae532025+14%1970
Least FlycatcherTyrannidae432025+202%1970
American RobinTurdidae352025+673%1970
Grasshopper SparrowPasserellidae302025-10%1970
Western KingbirdTyrannidae272025-26%1970
Horned LarkAlaudidae262025-66%1970
MallardAnatidae262025+66%1971
BobolinkIcteridae252025+139%1970
European StarlingSturnidae202025+174%1970
Black TernLaridae192025-5%1970
Clay-colored SparrowPasserellidae192025-45%1970
Chipping SparrowPasserellidae162025+683%1973
Common YellowthroatParulidae152025+214%1970
House SparrowPasseridae152025-55%1970
RedheadAnatidae152025+560%1996
Orchard OrioleIcteridae14202511×1971
American GoldfinchFringillidae142025-51%1970
Warbling VireoVireonidae142025+314%1970
Upland SandpiperScolopacidae132025-42%1970
Lark SparrowPasserellidae12202512×1986
Savannah SparrowPasserellidae112025+86%1970
Song SparrowPasserellidae112025+109%1970
Barn SwallowHirundinidae102025+27%1970
Wilson's SnipeScolopacidae92025+32%1973
Bank SwallowHirundinidae92024-63%1973
Sharp-tailed GrousePhasianidae92025+600%1976
Marsh WrenTroglodytidae92025-35%1975
Chestnut-collared LongspurCalcariidae82025-92%1970

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