BirdAnalyst
BBS Route · Maine · BCR 14

Hartford Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 46 survey years, still active.

128Species 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 →
46Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2025Span
2Observers

Bird Species Found on Maine Hartford

Top 40 of 128 species by most recent count. Each links to its species trend.

Species recorded on the Hartford 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
Canada GooseAnatidae602025+57%1991
Red-eyed VireoVireonidae372025+8%1977
American CrowCorvidae252025-9%1977
Pine SiskinFringillidae202016+122%2001
Chestnut-sided WarblerParulidae132025-61%1977
American RedstartParulidae132025-57%1977
Mourning DoveColumbidae122025+19%1977
Chipping SparrowPasserellidae122025+42%1977
Bank SwallowHirundinidae122024+193%1977
Song SparrowPasserellidae112025-76%1977
American RobinTurdidae112025-79%1977
American GoldfinchFringillidae102025-60%1977
Pine WarblerParulidae92025+400%1991
Common GrackleIcteridae82025-74%1977
OvenbirdParulidae82025-62%1977
Black-capped ChickadeeParidae82025-61%1977
Wild TurkeyPhasianidae82025+233%2009
Great Black-backed GullLaridae71988+167%1978
Common YellowthroatParulidae72025-78%1977
Eastern PhoebeTyrannidae62025-18%1977
Barn SwallowHirundinidae62025-84%1977
Cedar WaxwingBombycillidae62024-58%1977
Gray CatbirdMimidae62025-84%1977
Tufted TitmouseParidae62025+114%2003
Red-winged BlackbirdIcteridae52025-87%1977
Cliff SwallowHirundinidae52021-39%1977
Tree SwallowHirundinidae52025-83%1977
Northern House WrenTroglodytidae42025-17%1977
Double-crested CormorantPhalacrocoracidae42000+17%1981
Northern CardinalCardinalidae42025+33%1992
MallardAnatidae42024+60%1999
Blue-gray GnatcatcherPolioptilidae41997n/an/a
Broad-winged HawkAccipitridae32024+67%1981
Yellow-bellied SapsuckerPicidae32023+57%1979
Eastern KingbirdTyrannidae32025-39%1977
Great Crested FlycatcherTyrannidae32025-44%1978
Blue JayCorvidae32025-52%1977
Scarlet TanagerCardinalidae32024-60%1977
Common RavenCorvidae32025+180%1979
Indigo BuntingCardinalidae32025+17%1978

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