BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Swainson's Hawk In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Swainson's Hawk in Southern Rockies / Colorado Plateau has surged: up 141% on the route-weighted index since 1970.

+141%Since 1970
104Routes In Region
55Years

Notable Signals

long arc increasecomputed index

Swainson's Hawk has surged in Southern Rockies / Colorado Plateau: up 141% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Swainson's Hawk in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.40 (95% range 0.20–0.59). A 5-year backtest shows a typical error of ±7.9%, with 100% of held-out values landing inside the 95% band.

+2%Change by 2029
0.40Projected 2029 index
0.20–0.5995% range
±7.9%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.380.190.57
20260.390.190.58
20270.390.200.58
20280.390.200.59
20290.400.200.59

Routes In Southern Rockies / Colorado Plateau

Routes recording Swainson's Hawk in Southern Rockies / Colorado Plateau.
MoffatCOLORADO152024
MesitaCOLORADO92024
DatilNEW-MEXICO61995
Willow PeakCOLORADO42021
AlamosaCOLORADO42024
BeckUTAH41987
WaldenCOLORADO32022
FlattopsCOLORADO32019
Gallo ArroyoNEW-MEXICO32021
Rose WellsARIZONA21969
SeligmanARIZONA22023
ParlinCOLORADO22015
FruitaCOLORADO22007
DoylevilleCOLORADO22014
San LuisCOLORADO22024
MoscaCOLORADO22024
Lake City 2COLORADO22022
CorreoNEW-MEXICO21980
Horse MtnNEW-MEXICO22024
MountainairNEW-MEXICO22024
CastletonUTAH21977
FayetteUTAH22019
WestwaterUTAH22017
HuntARIZONA11976
Dry ParkARIZONA11996

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