BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Mifflintown Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 119 species recorded across 54 survey years, still active.

119Species 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 →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2025Span
7Observers

Bird Species Found on Pennsylvania Mifflintown

Top 40 of 119 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
Rock PigeonColumbidae922025-53%1968
American RobinTurdidae892025+2%1968
European StarlingSturnidae722025-54%1968
Red-winged BlackbirdIcteridae592025-68%1968
Common GrackleIcteridae462025-65%1968
Canada GooseAnatidae402025+40%1993
Mourning DoveColumbidae372025+194%1968
House SparrowPasseridae372025-82%1968
Song SparrowPasserellidae362025+136%1968
Barn SwallowHirundinidae272025-57%1968
American CrowCorvidae242025-11%1968
Northern CardinalCardinalidae242025+32%1968
Carolina WrenTroglodytidae22202520×1968
House FinchFringillidae222025+223%1983
Bank SwallowHirundinidae211986n/an/a
Red-bellied WoodpeckerPicidae20202512×1987
Chipping SparrowPasserellidae192025+12%1968
Gray CatbirdMimidae182025+20%1968
American GoldfinchFringillidae152025-51%1968
Indigo BuntingCardinalidae142025+58%1968
Purple MartinHirundinidae122024-17%1978
Eastern BluebirdTurdidae122025+520%1980
Blue JayCorvidae102025+119%1968
Field SparrowPasserellidae102025-42%1968
OvenbirdParulidae102025+450%1973
Baltimore OrioleIcteridae92025-50%1968
Common YellowthroatParulidae92025+53%1968
KilldeerCharadriidae82025+17%1968
Great Crested FlycatcherTyrannidae82025-26%1968
Northern Rough-winged SwallowHirundinidae72025+71%1970
Cedar WaxwingBombycillidae72025+275%1973
Red-eyed VireoVireonidae72025+193%1968
Wood DuckAnatidae72011+600%2000
Northern MockingbirdMimidae62025+433%1968
Eastern MeadowlarkIcteridae52025-86%1968
Eastern TowheePasserellidae52025+22%1968
Yellow WarblerParulidae52025+125%1968
Tufted TitmouseParidae52025-12%1968
Wood ThrushTurdidae52025-24%1970
Tree SwallowHirundinidae52025+267%1986

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.