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BBS Route · Maine · BCR 14

Warren Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 15 survey years, no longer active.

103Species 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 →
15Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–1990Span
5Observers

Bird Species Found on Maine Warren

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the Warren 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
European StarlingSturnidae481990-30%1975
American RobinTurdidae411990+22%1975
Common GrackleIcteridae321990+60%1977
Song SparrowPasserellidae321990-12%1975
Common YellowthroatParulidae261990-2%1975
Mourning DoveColumbidae241990+215%1979
Bank SwallowHirundinidae211990+104%1975
OvenbirdParulidae211990+20%1975
Red-winged BlackbirdIcteridae191990-8%1975
Yellow WarblerParulidae191990+50%1975
White-throated SparrowPasserellidae171990-43%1975
Red-eyed VireoVireonidae161990+58%1975
Black-capped ChickadeeParidae141990+150%1975
Eastern PhoebeTyrannidae131990-4%1975
Least FlycatcherTyrannidae131990+225%1975
Tree SwallowHirundinidae111990-18%1975
Chestnut-sided WarblerParulidae111990-5%1975
Brown-headed CowbirdIcteridae101990-29%1977
Barn SwallowHirundinidae101990-70%1975
American CrowCorvidae91990-22%1975
American RedstartParulidae91990+107%1975
Alder FlycatcherTyrannidae91990+150%1979
Blue JayCorvidae81990-27%1975
BobolinkIcteridae81990-63%1975
Nashville WarblerParulidae81990+75%1977
Wood ThrushTurdidae81990-72%1975
VeeryTurdidae81990-51%1975
American GoldfinchFringillidae71990+107%1975
Gray CatbirdMimidae71990-41%1975
American Black DuckAnatidae71989+600%1986
Black-and-white WarblerParulidae61990-21%1975
Rose-breasted GrosbeakCardinalidae51990+125%1975
Cedar WaxwingBombycillidae51990+200%1975
Chimney SwiftApodidae41990-85%1975
Eastern Wood-PeweeTyrannidae41990+22%1975
Chipping SparrowPasserellidae41990+81%1975
Black-throated Green WarblerParulidae41990+25%1977
Winter WrenTroglodytidae41990+100%1982
Rock PigeonColumbidae41989+80%1983
House FinchFringillidae41990+17%1988

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