BirdAnalyst
BBS Route · Maryland · BCR 28

Williamsport Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 115 species recorded across 58 survey years, still active.

115Species 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 →
58Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2024Span
12Observers

Bird Species Found on Maryland Williamsport

Top 40 of 115 species by most recent count. Each links to its species trend.

Species recorded on the Williamsport 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
European StarlingSturnidae3322024+38%1968
Common GrackleIcteridae2422024-39%1968
American RobinTurdidae1282024+181%1968
House SparrowPasseridae1052024-52%1968
Northern CardinalCardinalidae922024+359%1968
Mourning DoveColumbidae792024+142%1968
Carolina WrenTroglodytidae60202415×1968
Red-winged BlackbirdIcteridae592024-13%1968
Gray CatbirdMimidae59202419×1968
Chipping SparrowPasserellidae582024+290%1968
Rock PigeonColumbidae562024+58%1968
Northern MockingbirdMimidae492024+59%1968
House FinchFringillidae49202416×1982
Chimney SwiftApodidae482024+105%1968
Indigo BuntingCardinalidae362024+91%1968
Barn SwallowHirundinidae342024+484%1968
American GoldfinchFringillidae272024+654%1968
Fish CrowCorvidae262024+30%1968
Song SparrowPasserellidae262024+67%1968
Cedar WaxwingBombycillidae25202412×1980
Northern House WrenTroglodytidae252024+65%1968
Tufted TitmouseParidae242024+97%1968
American CrowCorvidae232024-41%1968
Eastern Wood-PeweeTyrannidae19202417×1969
Blue JayCorvidae192024+113%1968
Brown-headed CowbirdIcteridae192024+313%1968
Eastern KingbirdTyrannidae182024+733%1968
Great Crested FlycatcherTyrannidae182024+85%1968
Carolina ChickadeeParidae182024+675%1970
Red-eyed VireoVireonidae182024+820%1970
Eastern BluebirdTurdidae172024+633%1983
Black VultureCathartidae162024+560%2010
Red-bellied WoodpeckerPicidae152024+867%1970
Blue-gray GnatcatcherPolioptilidae152024+567%1982
Eastern MeadowlarkIcteridae122024-57%1968
Baltimore OrioleIcteridae122024+32%1968
Turkey VultureCathartidae122024+320%1986
Downy WoodpeckerPicidae112024+210%1968
Purple MartinHirundinidae112024+400%1968
Red-headed WoodpeckerPicidae102024+567%1968

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