BirdAnalyst
BBS Route · Maine · BCR 14

Hartford Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 45 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 →
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 →
1975–2024Span
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 GooseAnatidae472024-23%1991
Red-eyed VireoVireonidae362024-5%1977
American CrowCorvidae342024+15%1977
Pine SiskinFringillidae202016+122%2001
American RobinTurdidae172024-78%1977
European StarlingSturnidae152024-91%1977
Common GrackleIcteridae152023-77%1977
Chestnut-sided WarblerParulidae152024-65%1977
Song SparrowPasserellidae142024-77%1977
American GoldfinchFringillidae132024-60%1977
Bank SwallowHirundinidae122024+193%1977
Chipping SparrowPasserellidae112024+67%1977
OvenbirdParulidae112024-62%1977
Barn SwallowHirundinidae92024-83%1977
Common YellowthroatParulidae92024-80%1977
Common RavenCorvidae82024+240%1979
Tufted TitmouseParidae82024+86%2003
Great Black-backed GullLaridae71988+167%1978
American RedstartParulidae72024-73%1977
Pine WarblerParulidae72024+325%1991
Cedar WaxwingBombycillidae62024-58%1977
Indigo BuntingCardinalidae62024+8%1978
Eastern PhoebeTyrannidae52024-15%1977
BobolinkIcteridae52024-84%1977
Cliff SwallowHirundinidae52021-39%1977
Black-capped ChickadeeParidae52024-69%1977
Eastern KingbirdTyrannidae42024-39%1977
Blue JayCorvidae42024-62%1977
Yellow WarblerParulidae42024-54%1977
VeeryTurdidae42024-80%1977
Double-crested CormorantPhalacrocoracidae42000+17%1981
MallardAnatidae42024+60%1999
Blue-gray GnatcatcherPolioptilidae41997n/an/a
Mourning DoveColumbidae32024-19%1977
Broad-winged HawkAccipitridae32024+67%1981
Downy WoodpeckerPicidae32024+100%1978
Yellow-bellied SapsuckerPicidae32023+57%1979
Chimney SwiftApodidae32024-58%1977
Scarlet TanagerCardinalidae32024-60%1977
Tree SwallowHirundinidae32023-87%1977

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