BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Ansonia Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 78 species recorded across 22 survey years, still active.

78Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2002–2024Span
2Observers

Bird Species Found on Pennsylvania Ansonia

Top 40 of 78 species by most recent count. Each links to its species trend.

Species recorded on the Ansonia 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
OvenbirdParulidae642024+135%2004
Red-eyed VireoVireonidae492024+0%2004
VeeryTurdidae212024+34%2004
Black-and-white WarblerParulidae152024+153%2004
Blackburnian WarblerParulidae152024-8%2004
Wood ThrushTurdidae142024+26%2004
Cedar WaxwingBombycillidae142024+211%2013
Eastern TowheePasserellidae132024+388%2004
Black-throated Green WarblerParulidae132024-23%2004
Blue-headed VireoVireonidae122024+64%2004
American RobinTurdidae122024+221%2004
Yellow-bellied SapsuckerPicidae112024-18%2004
Common YellowthroatParulidae112024+36%2004
Scarlet TanagerCardinalidae102024-3%2004
Black-throated Blue WarblerParulidae102024+325%2004
Hooded WarblerParulidae102024+69%2006
Chestnut-sided WarblerParulidae92024+246%2004
Black-capped ChickadeeParidae92024+47%2004
Eastern Wood-PeweeTyrannidae82024+17%2004
American RedstartParulidae82024+26%2004
Hermit ThrushTurdidae82024-63%2004
Blue JayCorvidae72024+900%2004
Magnolia WarblerParulidae72024+0%2006
Common RavenCorvidae62024-75%2004
American CrowCorvidae52024-36%2004
Downy WoodpeckerPicidae52022+267%2007
Least FlycatcherTyrannidae42024-18%2004
Brown CreeperCerthiidae42024+83%2017
Eastern PhoebeTyrannidae32022+20%2009
Rose-breasted GrosbeakCardinalidae32024-18%2004
White-breasted NuthatchSittidae32024+6%2005
Ruby-throated HummingbirdTrochilidae32024+0%2006
American GoldfinchFringillidae32024+67%2013
Canada WarblerParulidae32023+200%2004
Tufted TitmouseParidae32024+75%2009
Mourning WarblerParulidae22024+100%2014
Gray CatbirdMimidae22024+75%2012
Winter WrenTroglodytidae22024+75%2005
Yellow-billed CuckooCuculidae22023-21%2006
Mourning DoveColumbidae22024+200%2007

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