BirdAnalyst
BBS Route · Massachusetts · BCR 30

Warren 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 11 survey years, still active.

108Species 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 →
11Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2010–2024Span
2Observers

Bird Species Found on Massachusetts Warren 2

Top 40 of 108 species by most recent count. Each links to its species trend.

Species recorded on the Warren 2 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
American RobinTurdidae992024+109%2012
Red-eyed VireoVireonidae482024+94%2012
Red-winged BlackbirdIcteridae442024+87%2012
Song SparrowPasserellidae372024+88%2012
Gray CatbirdMimidae332024+71%2012
OvenbirdParulidae312024+42%2012
Chipping SparrowPasserellidae282024+65%2012
Common GrackleIcteridae262024+165%2012
Common YellowthroatParulidae232024+74%2012
European StarlingSturnidae222024+73%2012
Northern CardinalCardinalidae212024-10%2012
Chimney SwiftApodidae192024+153%2012
House SparrowPasseridae192024+124%2012
Brown-headed CowbirdIcteridae172024+113%2012
Northern House WrenTroglodytidae172024+130%2012
Tufted TitmouseParidae142024+38%2012
Black-capped ChickadeeParidae142024+8%2012
Mourning DoveColumbidae132024-37%2012
Eastern PhoebeTyrannidae122024+22%2012
Baltimore OrioleIcteridae122024+12%2012
American GoldfinchFringillidae122024-30%2012
American RedstartParulidae122024+46%2012
American CrowCorvidae102024-60%2012
Yellow WarblerParulidae102024+32%2012
Tree SwallowHirundinidae92024+100%2012
Warbling VireoVireonidae92024+0%2012
House FinchFringillidae72024+333%2012
Great Blue HeronArdeidae62023+33%2016
Carolina WrenTroglodytidae62024+375%2012
Downy WoodpeckerPicidae52024+73%2012
Blue JayCorvidae52024-4%2012
Eastern TowheePasserellidae52024-10%2012
Wood ThrushTurdidae52024-30%2012
Black-billed CuckooCuculidae52019+150%2017
Indigo BuntingCardinalidae42024-36%2012
Red CrossbillFringillidae42024n/an/a
Canada GooseAnatidae32024+40%2017
Rock PigeonColumbidae32024+9%2012
Red-bellied WoodpeckerPicidae32024-6%2012
Barn SwallowHirundinidae32024-67%2012

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