BirdAnalyst
BBS Route · Maine · BCR 14

Biddeford Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 117 species recorded across 45 survey years, still active.

117Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2019Span
4Observers

Bird Species Found on Maine Biddeford

Top 40 of 117 species by most recent count. Each links to its species trend.

Species recorded on the Biddeford 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
Chipping SparrowPasserellidae452019+367%1975
Red-winged BlackbirdIcteridae412019-1%1975
American RobinTurdidae232019-43%1975
European StarlingSturnidae222019-12%1975
OvenbirdParulidae212019+25%1975
Song SparrowPasserellidae202019-31%1975
American GoldfinchFringillidae172019+54%1975
Red-eyed VireoVireonidae172019-18%1975
Mourning DoveColumbidae112019+4%1975
Common GrackleIcteridae92019+23%1975
House SparrowPasseridae92019-80%1978
Herring GullLaridae82006-72%1975
Common YellowthroatParulidae82019-78%1975
Black-capped ChickadeeParidae72019-13%1975
Tufted TitmouseParidae72019+400%1991
Wood DuckAnatidae71993+250%1985
Eastern TowheePasserellidae52019-95%1975
Yellow WarblerParulidae52018-33%1975
Northern MockingbirdMimidae52018-46%1978
Northern CardinalCardinalidae52019+200%1983
Purple MartinHirundinidae51976n/an/a
Glossy IbisThreskiornithidae51994+150%1978
Blue JayCorvidae42019-14%1975
Eastern PhoebeTyrannidae42019-52%1976
American Black DuckAnatidae42000+100%1975
Cedar WaxwingBombycillidae42019+17%1979
House FinchFringillidae42019+38%1980
Black-and-white WarblerParulidae32019+180%1975
VeeryTurdidae32018-78%1975
Hermit ThrushTurdidae32019-56%1975
Brown-headed CowbirdIcteridae32019+31%1976
Purple FinchFringillidae32013-38%1977
Prairie WarblerParulidae32019+300%1979
Great Black-backed GullLaridae21975+100%1973
Eastern KingbirdTyrannidae22019-74%1975
Eastern Wood-PeweeTyrannidae22019+0%1975
American CrowCorvidae22019-72%1975
BobolinkIcteridae22019-62%1975
White-throated SparrowPasserellidae22006-90%1975
Rose-breasted GrosbeakCardinalidae22006-46%1975

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