BirdAnalyst
BBS Route · Delaware · BCR 30

Frankford Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 32 survey years, no longer active.

104Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2012Span
8Observers

Bird Species Found on Delaware Frankford

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Frankford 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 StarlingSturnidae2362012+79%1968
Common GrackleIcteridae1642012+55%1968
Turkey VultureCathartidae105201212×1968
American RobinTurdidae682012+91%1968
Mourning DoveColumbidae432012+345%1968
Barn SwallowHirundinidae372012+86%1968
American CrowCorvidae322012-65%1968
Indigo BuntingCardinalidae322012+119%1968
Chipping SparrowPasserellidae272012-7%1968
Purple MartinHirundinidae262012+145%1968
House SparrowPasseridae232012-84%1968
Carolina WrenTroglodytidae232012+109%1968
Northern CardinalCardinalidae212012-54%1968
Northern MockingbirdMimidae182012+185%1968
Horned LarkAlaudidae172012+94%1968
Brown-headed CowbirdIcteridae172012+172%1968
Blue GrosbeakCardinalidae172012+171%1969
Great EgretArdeidae151966n/an/a
Tufted TitmouseParidae132012-51%1968
Red-eyed VireoVireonidae102012-30%1968
Wood ThrushTurdidae102012-52%1968
American GoldfinchFringillidae92012+375%1972
Common YellowthroatParulidae82012-57%1968
Eastern BluebirdTurdidae82012+180%1973
OvenbirdParulidae72012-20%1968
Blue JayCorvidae62012-43%1968
Carolina ChickadeeParidae62012+39%1968
Blue-gray GnatcatcherPolioptilidae62008+60%1977
Cedar WaxwingBombycillidae62012+500%1997
Red-bellied WoodpeckerPicidae52012+77%1968
Orchard OrioleIcteridae52012+83%1968
Yellow-throated VireoVireonidae51991+40%1968
Glossy IbisThreskiornithidae52007n/an/a
Great Crested FlycatcherTyrannidae42012+146%1968
Eastern Wood-PeweeTyrannidae42012+29%1968
Grasshopper SparrowPasserellidae42012+75%1968
Field SparrowPasserellidae42012-75%1968
Yellow WarblerParulidae42008+29%1973
Bald EagleAccipitridae42012+300%2007
KilldeerCharadriidae32012+217%1968

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