BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Mifflintown Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 118 species recorded across 53 survey years, still active.

118Species 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 →
53Years 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
7Observers

Bird Species Found on Pennsylvania Mifflintown

Top 40 of 118 species by most recent count. Each links to its species trend.

Species recorded on the Mifflintown 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
Red-winged BlackbirdIcteridae1392024-65%1968
American RobinTurdidae932024+5%1968
European StarlingSturnidae852024-52%1968
Common GrackleIcteridae632024-62%1968
Mourning DoveColumbidae522024+225%1968
Song SparrowPasserellidae472024+123%1968
House SparrowPasseridae392024-84%1968
American CrowCorvidae322024-13%1968
Chipping SparrowPasserellidae312024+31%1968
Northern CardinalCardinalidae312024+41%1968
Red-bellied WoodpeckerPicidae27202412×1987
Gray CatbirdMimidae262024+54%1968
Carolina WrenTroglodytidae25202418×1968
Canada GooseAnatidae242024+21%1993
Rock PigeonColumbidae222024-81%1968
Indigo BuntingCardinalidae212024+68%1968
Barn SwallowHirundinidae212024-61%1968
Bank SwallowHirundinidae211986n/an/a
Red-eyed VireoVireonidae192024+220%1968
Cedar WaxwingBombycillidae182024+267%1973
Northern MockingbirdMimidae162024+467%1968
Turkey VultureCathartidae122024+100%1970
Purple MartinHirundinidae122024-17%1978
House FinchFringillidae122024+177%1983
KilldeerCharadriidae112024+4%1968
Field SparrowPasserellidae112024-48%1968
Common YellowthroatParulidae112024+53%1968
Eastern PhoebeTyrannidae102024+20%1968
American GoldfinchFringillidae102024-53%1968
Yellow WarblerParulidae102024+125%1968
Chimney SwiftApodidae82024-30%1968
Blue JayCorvidae82024+169%1968
Tufted TitmouseParidae72024+0%1968
Scarlet TanagerCardinalidae72024+120%1970
Wood DuckAnatidae72011+600%2000
Downy WoodpeckerPicidae62024+100%1968
Eastern Wood-PeweeTyrannidae62024+240%1970
Baltimore OrioleIcteridae62024-48%1968
OvenbirdParulidae62024+350%1973
Northern House WrenTroglodytidae62024-20%1968

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