BirdAnalyst
BBS Route · North Dakota · BCR 11

Regan Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 54 survey years, still active.

128Species 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 →
1968–2025Span
5Observers

Bird Species Found on North Dakota Regan

Top 40 of 128 species by most recent count. Each links to its species trend.

Species recorded on the Regan 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 BlackbirdIcteridae2732025+188%1970
Cliff SwallowHirundinidae1912025+74%1970
Yellow-headed BlackbirdIcteridae125202525×1970
Mourning DoveColumbidae1082025+196%1970
Brown-headed CowbirdIcteridae1072025+155%1970
Common GrackleIcteridae692025+280%1970
Horned LarkAlaudidae622025-2%1970
Western MeadowlarkIcteridae562025-54%1970
American RobinTurdidae55202514×1972
Ring-necked PheasantPhasianidae42202518×1970
Marsh WrenTroglodytidae302025+600%1972
Vesper SparrowPasserellidae27202513×1972
BobolinkIcteridae252025+523%1970
Song SparrowPasserellidae222025+367%1973
American GoldfinchFringillidae202025+150%1970
Eastern KingbirdTyrannidae162025+167%1970
Chipping SparrowPasserellidae162025+150%1999
KilldeerCharadriidae152025+7%1970
Clay-colored SparrowPasserellidae142025+75%1970
Upland SandpiperScolopacidae132025+44%1970
Common YellowthroatParulidae132025+15%1970
Northern PintailAnatidae132023+220%1972
GadwallAnatidae122025+179%1970
Blue-winged TealAnatidae122025+124%1970
Barn SwallowHirundinidae112025+72%1970
Grasshopper SparrowPasserellidae102025-4%1970
Yellow WarblerParulidae102025+156%1971
Ring-billed GullLaridae92025-39%1970
Northern House WrenTroglodytidae92025+300%1971
Wilson's SnipeScolopacidae72025+500%1976
Least FlycatcherTyrannidae62025+350%1970
MallardAnatidae52025+223%1970
Field SparrowPasserellidae52025+133%1986
DickcisselCardinalidae52025+86%1974
SoraRallidae52025+275%1973
American AvocetRecurvirostridae41983+150%1974
Red-tailed HawkAccipitridae42023+175%1982
Swainson's HawkAccipitridae42025+100%1977
Canada GooseAnatidae42023+675%2010
Swamp SparrowPasserellidae42025+67%2016

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