BirdAnalyst
BBS Route · Minnesota · BCR 23

Princeton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 139 species recorded across 56 survey years, still active.

139Species 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 →
56Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2025Span
4Observers

Bird Species Found on Minnesota Princeton

Top 40 of 139 species by most recent count. Each links to its species trend.

Species recorded on the Princeton 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 BlackbirdIcteridae502025-51%1971
Ring-necked PheasantPhasianidae352025+878%1971
American RobinTurdidae252025-22%1971
Common YellowthroatParulidae242025+52%1971
Mourning DoveColumbidae222025-49%1971
Wild TurkeyPhasianidae222025+950%2004
American CrowCorvidae192025-10%1971
Rock PigeonColumbidae162025+7%1971
Cliff SwallowHirundinidae162025-10%1972
Great Crested FlycatcherTyrannidae152025+240%1971
European StarlingSturnidae152025-74%1971
Canada GooseAnatidae142025+111%1989
Northern House WrenTroglodytidae132025+82%1971
Sandhill CraneGruidae122025+800%2004
Barn SwallowHirundinidae112025-49%1971
Indigo BuntingCardinalidae102025+300%1972
Rose-breasted GrosbeakCardinalidae92025+32%1971
Blue JayCorvidae82025+19%1971
American GoldfinchFringillidae82025-43%1971
Chipping SparrowPasserellidae82025-31%1971
Song SparrowPasserellidae72025-56%1971
Yellow WarblerParulidae72025+82%1971
Sedge WrenTroglodytidae72025+92%1971
Northern CardinalCardinalidae62024+475%1978
Double-crested CormorantPhalacrocoracidae62013+500%2003
Eastern KingbirdTyrannidae52025-14%1971
Eastern Wood-PeweeTyrannidae52025+163%1971
Vesper SparrowPasserellidae52024-63%1971
Savannah SparrowPasserellidae52025-55%1971
VeeryTurdidae52025+13%1971
Green HeronArdeidae52025+0%1972
Purple MartinHirundinidae52025+78%1975
Black-capped ChickadeeParidae52025+150%1975
Trumpeter SwanAnatidae52025+43%2016
Ruddy DuckAnatidae52013n/an/a
Black TernLaridae42025-44%1971
KilldeerCharadriidae42025-46%1971
Horned LarkAlaudidae42025+100%1971
Swamp SparrowPasserellidae42025+63%1972
Red-eyed VireoVireonidae42025-27%1971

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