BirdAnalyst
BBS Route · Maine · BCR 14

Heron Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 19 survey years, still active.

99Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2003Span
3Observers

Bird Species Found on Maine Heron Lake

Top 40 of 99 species by most recent count. Each links to its species trend.

Species recorded on the Heron Lake 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
White-throated SparrowPasserellidae512003-66%1985
Magnolia WarblerParulidae332003+40%1985
American RobinTurdidae282003-51%1985
Hermit ThrushTurdidae262003+186%1987
Winter WrenTroglodytidae212003-30%1985
Nashville WarblerParulidae192003+13%1985
Swainson's ThrushTurdidae182003-62%1985
Red-eyed VireoVireonidae172003+12%1985
Pine SiskinFringillidae132001+114%1993
Blue JayCorvidae122003-50%1985
Common YellowthroatParulidae122003-39%1985
VeeryTurdidae112003-25%1985
Northern ParulaParulidae102003-35%1985
Wood ThrushTurdidae81999+10%1987
Fox SparrowPasserellidae82003+90%1999
Common RavenCorvidae72002-58%1986
White-winged CrossbillFringillidae72000-81%1986
Cedar WaxwingBombycillidae72003-19%1985
Yellow-bellied SapsuckerPicidae62003-48%1985
Pileated WoodpeckerPicidae62003-42%1985
American RedstartParulidae62003-62%1985
Alder FlycatcherTyrannidae52003+33%1985
Black-capped ChickadeeParidae52003+0%1985
Philadelphia VireoVireonidae52003+14%1995
Wilson's SnipeScolopacidae42003+29%1986
Common GrackleIcteridae41993+88%1985
Song SparrowPasserellidae42003+0%1985
Barn SwallowHirundinidae41988-14%1985
Black-throated Blue WarblerParulidae42003-25%1985
Chestnut-sided WarblerParulidae42003+27%1985
Northern WaterthrushParulidae42003+14%1986
Downy WoodpeckerPicidae32003-25%1986
Chimney SwiftApodidae32003+100%1986
Yellow-bellied FlycatcherTyrannidae32003-20%1986
Least FlycatcherTyrannidae32003-55%1985
Purple FinchFringillidae32003-89%1985
OvenbirdParulidae32003-59%1985
Mourning WarblerParulidae32003-66%1985
Red-breasted NuthatchSittidae32003-73%1986
Cape May WarblerParulidae32003+100%1993

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