BirdAnalyst
Species · Pennsylvania · BBS 2025 Release · 1966–2024

Western Cattle-Egret Population Trend in Pennsylvania

All statesWetland birds

Western Cattle-Egret in Pennsylvania has risen sharply: up 59% on the route-weighted index since 1970.

+59%Since 1970TrendPercent 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 →
9Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Western Cattle-Egret Trends in PennsylvaniaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Western Cattle-Egret has risen sharply in Pennsylvania: up 59% on the route-weighted index since 1970.

Western Cattle-Egret Survey Routes in Pennsylvania

Routes recording Western Cattle-Egret in Pennsylvania.
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 →
Ephrata3019761971
Sporting Hil1419771977
Mount Joy1219901979
West Grove319791967
Middletown319811981
Labott219831970
Mt Gretna219901969
Doe Run119861986
Gatchelville119841977

Western Cattle-Egret Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradodelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandminnesotamississippimissourinebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.