BirdAnalyst
Species · BCR 33 · BBS 2025 Release · 1966–2024

Cooper's Hawk In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGeneralists

Cooper's Hawk in Sonoran and Mojave Deserts has edged down: down 18% on the route-weighted index since 1980.

-18%Since 1980TrendPercent 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 →
16Routes 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 →
25YearsYears 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 →

No notable trend signals for Cooper's Hawk in Sonoran and Mojave Deserts. See the full index history below.

Cooper's Hawk In Sonoran and Mojave Deserts Population Forecast

If the recent trend holds, Cooper's Hawk in Sonoran and Mojave Deserts is projected to fall about 39% by 2029 — from 0.07 in 2024 to a central estimate of 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±31.5%, with 100% of held-out values landing inside the 95% band.

-39%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 →
0.04Projected 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 →
0.00–0.0895% 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 →
±31.5%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 Sonoran and Mojave Deserts is projected to fall about 39% by 2029 — from 0.07 in 2024 to a central estimate of 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±31.5%, with 100% of held-out values landing inside the 95% band.19732029
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 →
20250.040.000.08
20260.040.000.08
20270.040.000.08
20280.040.000.08
20290.040.000.08

Routes In Sonoran and Mojave Deserts

Routes recording Cooper's Hawk in Sonoran and Mojave Deserts.
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 →
Red RockARIZONA22007
WildroseCALIFORNIA22021
RivieraARIZONA12014
Palo VerdeARIZONA12011
Cabeza PrietARIZONA12024
WickenburgARIZONA12023
Casa GrandeARIZONA12013
OnyxCALIFORNIA11993
Calif CityCALIFORNIA11980
GoldstoneCALIFORNIA11987
TecopaCALIFORNIA11989
PearblossomCALIFORNIA12016
Death ValleyCALIFORNIA11977
Kelso ValleyCALIFORNIA12010
Willow Springs 2CALIFORNIA12024
Ash MeadowsNEVADA12016

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