BirdAnalyst
BBS Route · Massachusetts · BCR 30

Princeton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 81 species recorded across 8 survey years, no longer active.

81Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–1976Span
2Observers

Bird Species Found on Massachusetts Princeton

Top 40 of 81 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
American RobinTurdidae891976+42%1971
European StarlingSturnidae681976-9%1971
Canada GooseAnatidae301976+217%1973
American CrowCorvidae271976+79%1971
Song SparrowPasserellidae231976+10%1971
Blue JayCorvidae221976+16%1971
Eastern TowheePasserellidae211976-19%1971
Red-eyed VireoVireonidae201976-21%1971
House SparrowPasseridae201976-46%1971
Mourning DoveColumbidae171976+161%1971
Common YellowthroatParulidae161976+2%1971
Northern House WrenTroglodytidae161976+31%1971
Red-winged BlackbirdIcteridae151976-21%1971
Common GrackleIcteridae151976-30%1971
Wood ThrushTurdidae151976-6%1971
Gray CatbirdMimidae131976-9%1971
Baltimore OrioleIcteridae121976-11%1971
Eastern KingbirdTyrannidae111976+44%1971
BobolinkIcteridae101976-9%1971
OvenbirdParulidae101976+7%1971
Barn SwallowHirundinidae81976+10%1971
Black-capped ChickadeeParidae81976-17%1971
VeeryTurdidae81976+30%1971
Eastern PhoebeTyrannidae71976+13%1971
Tree SwallowHirundinidae71976+4%1971
Brown-headed CowbirdIcteridae61976-43%1971
Chipping SparrowPasserellidae61976-27%1971
American GoldfinchFringillidae51976+40%1971
Scarlet TanagerCardinalidae51976-15%1971
Yellow WarblerParulidae51976+200%1971
Chestnut-sided WarblerParulidae51976-32%1971
Blue-headed VireoVireonidae51976+200%1973
Eastern MeadowlarkIcteridae41976+70%1971
Cedar WaxwingBombycillidae41976-35%1971
Brown ThrasherMimidae41976-26%1972
Red-breasted NuthatchSittidae41976+71%1973
Rock PigeonColumbidae31972-25%1969
Black-and-white WarblerParulidae31976+0%1971
Downy WoodpeckerPicidae31975+13%1972
Hermit ThrushTurdidae31976+60%1973

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