BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Cooper's Hawk In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastGeneralists

Cooper's Hawk in New England / Mid-Atlantic Coast has surged: up 14× on the route-weighted index since 1968.

14×Since 1968TrendPercent 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 →
113Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
51YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 →

Cooper's Hawk has surged in New England / Mid-Atlantic Coast: up 14× on the route-weighted index since 1968.

Cooper's Hawk In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Cooper's Hawk in New England / Mid-Atlantic Coast is projected to fall about 10% by 2029 — from 0.24 in 2024 to a central estimate of 0.21 (95% range 0.12–0.30). A 5-year backtest shows a typical error of ±22.3%, with 100% of held-out values landing inside the 95% band.

-10%Change by 2029TrendPercent 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 →
0.21Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.12–0.3095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±22.3%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Cooper's Hawk in New England / Mid-Atlantic Coast is projected to fall about 10% by 2029 — from 0.24 in 2024 to a central estimate of 0.21 (95% range 0.12–0.30). A 5-year backtest shows a typical error of ±22.3%, with 100% of held-out values landing inside the 95% band.19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.200.110.29
20260.200.110.29
20270.200.120.29
20280.210.120.30
20290.210.120.30

Routes In New England / Mid-Atlantic Coast

Routes recording Cooper's Hawk in New England / Mid-Atlantic Coast.
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 →
NewburyportMASSACHUSETTS32022
HolleyvilleDELAWARE22003
Holleyville 2DELAWARE22018
St. George'S IslandMARYLAND22017
Pr FrederickMARYLAND22022
East KingstonNEW-HAMPSHIRE22009
CranburyNEW-JERSEY22024
Wallum LakeRHODE-ISLAND22017
MysticCONNECTICUT12021
BuckinghamCONNECTICUT12014
UncasvilleCONNECTICUT12015
WoodstockCONNECTICUT11981
WestbrookCONNECTICUT12019
WillimanticCONNECTICUT12005
No WoodburyCONNECTICUT12012
ShermanCONNECTICUT11982
GreenwichCONNECTICUT12009
DanburyCONNECTICUT12015
WarrenCONNECTICUT12002
Mid HaddamCONNECTICUT12015
SouthingtonCONNECTICUT12016
Woodstock 2CONNECTICUT12016
Warren 2CONNECTICUT12022
GranbyCONNECTICUT12021
Mt PleasantDELAWARE12006

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