BirdAnalyst
BBS Route · North Dakota · BCR 11

Regan Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 127 species recorded across 52 survey years, still active.

127Species 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 →
52Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2022Span
4Observers

Bird Species Found on North Dakota Regan

Top 40 of 127 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 BlackbirdIcteridae1612022+96%1970
Brown-headed CowbirdIcteridae1052022+148%1970
Cliff SwallowHirundinidae842022+106%1970
Horned LarkAlaudidae602022-8%1970
Western MeadowlarkIcteridae502022-49%1970
Ring-necked PheasantPhasianidae46202221×1970
Mourning DoveColumbidae442022+91%1970
Yellow-headed BlackbirdIcteridae43202215×1970
Common GrackleIcteridae422022+249%1970
BobolinkIcteridae392022+723%1970
Eastern KingbirdTyrannidae312022+242%1970
Clay-colored SparrowPasserellidae212022+150%1970
Vesper SparrowPasserellidae20202213×1972
Franklin's GullLaridae201997n/an/a
Marsh WrenTroglodytidae182022+536%1972
Sedge WrenTroglodytidae17202213×1975
MallardAnatidae152022+277%1970
Orchard OrioleIcteridae152022+625%1979
American RobinTurdidae152022+850%1972
American GoldfinchFringillidae132022+175%1970
Brewer's BlackbirdIcteridae132022+525%1972
Wilson's SnipeScolopacidae122022+875%1976
Rock PigeonColumbidae122022+113%1982
Western KingbirdTyrannidae112022+275%1970
Northern House WrenTroglodytidae112022+325%1971
Canada GooseAnatidae112022+700%2010
Willow FlycatcherTyrannidae102022+825%1977
GadwallAnatidae92022+121%1970
Common YellowthroatParulidae92022-11%1970
House SparrowPasseridae92022+0%1970
Warbling VireoVireonidae82022+450%1980
Blue-winged TealAnatidae72022+65%1970
Grasshopper SparrowPasserellidae72022+41%1970
Brown ThrasherMimidae72022+33%1971
Yellow WarblerParulidae72022+122%1971
Tree SwallowHirundinidae72022+220%1986
Least FlycatcherTyrannidae62022+475%1970
Chestnut-collared LongspurCalcariidae62022-62%1970
Barn SwallowHirundinidae62022+39%1970
Northern ShovelerAnatidae62022+240%1975

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