BirdAnalyst
BBS Route · Maryland · BCR 29

Earlton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 8 survey years, still active.

93Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2014–2024Span
1Observers

Bird Species Found on Maryland Earlton

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Earlton 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
Northern CardinalCardinalidae1572024+94%2016
American RobinTurdidae1332024+171%2016
Gray CatbirdMimidae972024+81%2016
Carolina WrenTroglodytidae962024+226%2016
European StarlingSturnidae952024-31%2016
Chipping SparrowPasserellidae712024+43%2016
Northern MockingbirdMimidae602024+99%2016
Canada GooseAnatidae582024+49%2016
Red-winged BlackbirdIcteridae582024+75%2016
House SparrowPasseridae582024+109%2016
Red-eyed VireoVireonidae552024+28%2016
Song SparrowPasserellidae532024+34%2016
Turkey VultureCathartidae522024+100%2016
Barn SwallowHirundinidae512024+37%2016
Acadian FlycatcherTyrannidae482024+7%2016
Eastern Wood-PeweeTyrannidae472024+53%2016
Indigo BuntingCardinalidae432024+21%2016
House FinchFringillidae402024+146%2016
American CrowCorvidae392024-15%2016
Carolina ChickadeeParidae322024+19%2016
Northern House WrenTroglodytidae312024+22%2016
Wood ThrushTurdidae292024+21%2016
Eastern BluebirdTurdidae272024+94%2016
Brown-headed CowbirdIcteridae262024+84%2016
American GoldfinchFringillidae262024+83%2016
Tufted TitmouseParidae262024-20%2016
Mourning DoveColumbidae252024+41%2016
Blue JayCorvidae232024+108%2016
Eastern TowheePasserellidae182024+129%2016
Cedar WaxwingBombycillidae182024-27%2016
Brown ThrasherMimidae182024+240%2016
White-breasted NuthatchSittidae182024+47%2016
Common YellowthroatParulidae172024+96%2016
Blue-gray GnatcatcherPolioptilidae172024-19%2016
Downy WoodpeckerPicidae162024+48%2016
Warbling VireoVireonidae162024+66%2016
OvenbirdParulidae152024-2%2016
Red-bellied WoodpeckerPicidae142024-9%2016
Common GrackleIcteridae132024-3%2016
Tree SwallowHirundinidae122024+130%2016

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