BirdAnalyst
BBS Route · Maine · BCR 14

Cambridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 120 species recorded across 32 survey years, still active.

120Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2014Span
5Observers

Bird Species Found on Maine Cambridge

Top 40 of 120 species by most recent count. Each links to its species trend.

Species recorded on the Cambridge 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
Pine SiskinFringillidae902001+96%1999
American CrowCorvidae392014+76%1969
Red-winged BlackbirdIcteridae192014-35%1969
Red-eyed VireoVireonidae182014+51%1969
European StarlingSturnidae132014-88%1969
Song SparrowPasserellidae112014-86%1969
American RobinTurdidae112014-66%1969
Mourning DoveColumbidae112014-46%1975
Cedar WaxwingBombycillidae102014+55%1969
Purple MartinHirundinidae101973n/an/a
Blue JayCorvidae92014-17%1969
Chipping SparrowPasserellidae92014+0%1969
Bank SwallowHirundinidae82008-86%1969
American GoldfinchFringillidae62014-94%1969
Tree SwallowHirundinidae62014-59%1969
OvenbirdParulidae62014-46%1969
Scarlet TanagerCardinalidae62008+200%1975
Common YellowthroatParulidae52013-64%1969
Rock PigeonColumbidae52014+160%1979
Double-crested CormorantPhalacrocoracidae51982n/an/a
Downy WoodpeckerPicidae42013+100%1972
House SparrowPasseridae42013-92%1969
Gray CatbirdMimidae42013-46%1969
Savannah SparrowPasserellidae42008-11%1970
Alder FlycatcherTyrannidae42008-8%1977
Great Crested FlycatcherTyrannidae32013-38%1971
BobolinkIcteridae32013-90%1969
American RedstartParulidae32012-33%1969
Black-and-white WarblerParulidae32013+20%1972
Swainson's ThrushTurdidae31975n/an/a
American KestrelFalconidae22006+25%1970
Eastern PhoebeTyrannidae22010+42%1969
Eastern Wood-PeweeTyrannidae22008-64%1969
Common RavenCorvidae22013+13%1970
Brown-headed CowbirdIcteridae22006-92%1969
Eastern MeadowlarkIcteridae22005-78%1969
Common GrackleIcteridae22014-86%1969
White-throated SparrowPasserellidae22014-90%1969
White-breasted NuthatchSittidae22008+50%1969
Black-capped ChickadeeParidae22014-85%1969

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