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

Mallard In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauWaterfowl

Mallard in Southern Rockies / Colorado Plateau has surged: up 130% on the route-weighted index since 1970.

+130%Since 1970
182Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Mallard has surged in Southern Rockies / Colorado Plateau: up 130% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Mallard in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 2.9 (95% range 1.1–4.7). A 5-year backtest shows a typical error of ±66.6%, with 100% of held-out values landing inside the 95% band.

+1%Change by 2029
2.9Projected 2029 index
1.1–4.795% range
±66.6%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
20252.81.04.6
20262.91.04.7
20272.91.14.7
20282.91.14.7
20292.91.14.7

Routes In Southern Rockies / Colorado Plateau

Routes recording Mallard in Southern Rockies / Colorado Plateau.
VernalUTAH942018
Mcphee Res.COLORADO902024
Rio Grnds RsCOLORADO382024
Alton 2UTAH352024
DinosaurCOLORADO332024
Dixie NfUTAH222024
KamasUTAH202024
ClevelandUTAH152019
AlamosaCOLORADO122024
Navajo LakeUTAH122024
HarmonyCOLORADO112024
Grizzly RdgeUTAH102024
BicknellUTAH102021
BrookhurstWYOMING92016
ColonaCOLORADO82014
San LuisCOLORADO82024
Fence LakeNEW-MEXICO81991
AltonUTAH82019
Yellowjacket PassCOLORADO72024
CortezCOLORADO62008
ThomasvilleCOLORADO62007
Ojo SarcoNEW-MEXICO62021
FerronUTAH62022
Peach SpringARIZONA52024
FalfaCOLORADO52024

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