BirdAnalyst
BBS Route · Pennsylvania · BCR 28

South Mtn Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 36 survey years, still active.

85Species 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 →
36Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1986–2023Span
2Observers

Bird Species Found on Pennsylvania South Mtn

Top 40 of 85 species by most recent count. Each links to its species trend.

Species recorded on the South Mtn 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
OvenbirdParulidae562023+26%1988
Red-eyed VireoVireonidae342023+34%1988
Eastern Wood-PeweeTyrannidae242023-40%1988
Chipping SparrowPasserellidae172023+52%1988
Wood ThrushTurdidae172023-43%1988
Eastern TowheePasserellidae162023-53%1988
American RobinTurdidae142023-52%1988
Blue JayCorvidae122023-42%1988
Mourning DoveColumbidae112023-41%1988
American CrowCorvidae82023+106%1988
European StarlingSturnidae82023-30%1988
Indigo BuntingCardinalidae72023+29%1988
Gray CatbirdMimidae72023-33%1988
Blue-gray GnatcatcherPolioptilidae72023+180%1992
Scarlet TanagerCardinalidae62023-76%1988
Northern House WrenTroglodytidae62023-30%1988
White-breasted NuthatchSittidae62023+129%1989
House FinchFringillidae52023-58%1988
Tufted TitmouseParidae52023-49%1988
VeeryTurdidae52023+40%1989
Northern CardinalCardinalidae42023+79%1988
Black-and-white WarblerParulidae42023-65%1988
Carolina WrenTroglodytidae42023+300%1988
Downy WoodpeckerPicidae32023+33%1988
Barn SwallowHirundinidae32019-11%1988
Worm-eating WarblerParulidae32023-29%1989
Hooded WarblerParulidae32022-55%1988
Wild TurkeyPhasianidae32007+100%1994
Canada GooseAnatidae22013-57%1991
Yellow-billed CuckooCuculidae22023+10%1988
Red-bellied WoodpeckerPicidae22023+50%1988
Ruby-throated HummingbirdTrochilidae22023+25%1988
Eastern PhoebeTyrannidae22019-43%1989
Brown-headed CowbirdIcteridae22022-42%1988
Common YellowthroatParulidae22023-53%1988
Eastern BluebirdTurdidae22023+50%1988
Northern MockingbirdMimidae22023+33%1990
Hairy WoodpeckerPicidae22022+25%1992
Eastern Whip-poor-willCaprimulgidae22017-43%1991
Red-winged BlackbirdIcteridae22023+100%1996

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