BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Ansonia Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 78 species recorded across 23 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2002–2025Span
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
OvenbirdParulidae652025+142%2004
Red-eyed VireoVireonidae642025-1%2004
Eastern TowheePasserellidae212025+463%2004
Black-throated Green WarblerParulidae202025-26%2004
Chestnut-sided WarblerParulidae192025+262%2004
Black-and-white WarblerParulidae162025+168%2004
VeeryTurdidae142025+21%2004
American RobinTurdidae142025+229%2004
Blackburnian WarblerParulidae122025-8%2004
Hooded WarblerParulidae122025+106%2006
Blue JayCorvidae92025+675%2004
American CrowCorvidae82025-33%2004
Scarlet TanagerCardinalidae82025+3%2004
Common YellowthroatParulidae82025+36%2004
Hermit ThrushTurdidae82025-68%2004
Common RavenCorvidae72025-60%2004
Yellow-bellied SapsuckerPicidae62025-18%2004
American RedstartParulidae62025+15%2004
Least FlycatcherTyrannidae52025+0%2004
Rose-breasted GrosbeakCardinalidae52025-6%2004
Gray CatbirdMimidae52025+175%2012
Black-capped ChickadeeParidae52025+16%2004
Wood ThrushTurdidae52025-4%2004
Downy WoodpeckerPicidae52022+267%2007
Cedar WaxwingBombycillidae52025+178%2013
Pileated WoodpeckerPicidae42025+0%2005
Blue-headed VireoVireonidae42025+41%2004
Mourning WarblerParulidae42025+200%2014
Brown CreeperCerthiidae42025+67%2017
Louisiana WaterthrushParulidae42025+133%2008
Hairy WoodpeckerPicidae32025-25%2005
Eastern Wood-PeweeTyrannidae32025+11%2004
Black-throated Blue WarblerParulidae32025+200%2004
Magnolia WarblerParulidae32025+0%2006
White-breasted NuthatchSittidae32025-29%2005
Red-breasted NuthatchSittidae32025+67%2004
Winter WrenTroglodytidae32025+100%2005
Tufted TitmouseParidae32024+75%2009
Mourning DoveColumbidae32025+150%2007
Acadian FlycatcherTyrannidae22025+67%2007

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