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

Gadwall In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauWaterfowl

Gadwall in Southern Rockies / Colorado Plateau has surged: up 945% on the route-weighted index since 1970.

+945%Since 1970
71Routes In Region
50Years

Notable Signals

long arc increasecomputed index

Gadwall has surged in Southern Rockies / Colorado Plateau: up 945% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Gadwall in Southern Rockies / Colorado Plateau is projected to rise about 65% by 2029 — from 0.78 in 2024 to a central estimate of 1.3 (95% range 0.64–1.9). A 5-year backtest shows a typical error of ±87%, with 0% of held-out values landing inside the 95% band.

+65%Change by 2029
1.3Projected 2029 index
0.64–1.995% range
±87%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
20251.20.561.8
20261.20.581.9
20271.20.601.9
20281.30.621.9
20291.30.641.9

Routes In Southern Rockies / Colorado Plateau

Routes recording Gadwall in Southern Rockies / Colorado Plateau.
Rio Grnds RsCOLORADO482024
VernalUTAH312016
Cochetopa PassCOLORADO132024
BrookhurstWYOMING112013
Stinking Lk.NEW-MEXICO101996
Navajo LakeUTAH92024
Blackhead PkCOLORADO81996
DinosaurCOLORADO82024
Stillwater PassCOLORADO82007
Wellington 2UTAH82011
Weston PassCOLORADO52000
PowderhornCOLORADO52019
DulceNEW-MEXICO52024
Sybille CynWYOMING52014
SawmillARIZONA42014
CortezCOLORADO42007
BasinCOLORADO42010
GallinasNEW-MEXICO42012
Angel Fire 2NEW-MEXICO42024
CapulinNEW-MEXICO41993
JensenUTAH42023
FerronUTAH42013
AltonUTAH42010
BufordWYOMING42024
FalfaCOLORADO31997

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