BirdAnalyst
BBS Route · Delaware · BCR 30

Bethany Bch Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 18 survey years, no longer active.

100Species 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 →
18Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–1990Span
4Observers

Bird Species Found on Delaware Bethany Bch

Top 40 of 100 species by most recent count. Each links to its species trend.

Species recorded on the Bethany Bch 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
Laughing GullLaridae309199013×1970
WilletScolopacidae841990+464%1969
Red-winged BlackbirdIcteridae771990-20%1969
Common GrackleIcteridae671990-10%1969
Boat-tailed GrackleIcteridae641990+98%1969
Glossy IbisThreskiornithidae501989+629%1973
American RobinTurdidae451990+147%1969
Barn SwallowHirundinidae441990+28%1969
Song SparrowPasserellidae361990+47%1969
European StarlingSturnidae351990-59%1969
Fish CrowCorvidae241990-31%1969
Purple MartinHirundinidae241990+81%1969
House FinchFringillidae231990-6%1986
Least TernLaridae211990-64%1969
Ring-billed GullLaridae201967+43%1966
Mourning DoveColumbidae201990+207%1969
OspreyPandionidae161990+141%1970
MallardAnatidae151990+440%1972
House SparrowPasseridae131990-89%1969
Herring GullLaridae121990+30%1969
Northern MockingbirdMimidae111990-30%1969
Black SkimmerLaridae101990-7%1969
Gray CatbirdMimidae101990+140%1969
Common YellowthroatParulidae91990-29%1969
Northern BobwhiteOdontophoridae81990-52%1969
Blue JayCorvidae81990-44%1969
Brown-headed CowbirdIcteridae81990+83%1970
Chimney SwiftApodidae71990-48%1969
Northern House WrenTroglodytidae71990+113%1969
Green HeronArdeidae61990+183%1970
Rock PigeonColumbidae61990+111%1969
Yellow-crowned Night HeronArdeidae61989n/an/a
American CrowCorvidae51990-55%1969
Saltmarsh SparrowPasserellidae51966n/an/a
Red-eyed VireoVireonidae51990+33%1969
Carolina WrenTroglodytidae51990+260%1975
Great EgretArdeidae51990+40%1976
Snowy EgretArdeidae51990+50%1978
Common NighthawkCaprimulgidae41990-44%1969
Northern CardinalCardinalidae41990+71%1969

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