BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Williamson's Sapsucker In Northern Rockies

All regionsNorthern RockiesForest birds

Williamson's Sapsucker in Northern Rockies has surged: up 376% on the route-weighted index since 1972.

+376%Since 1972
83Routes In Region
51Years

Notable Signals

long arc increasecomputed index

Williamson's Sapsucker has surged in Northern Rockies: up 376% on the route-weighted index since 1972.

Forecast

If the recent trend holds, Williamson's Sapsucker in Northern Rockies is projected to fall about 20% by 2029 — from 0.48 in 2024 to a central estimate of 0.39 (95% range 0.18–0.59). A 5-year backtest shows a typical error of ±34.3%, with 100% of held-out values landing inside the 95% band.

-20%Change by 2029
0.39Projected 2029 index
0.18–0.5995% range
±34.3%Backtest error
19692029
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
20250.370.160.57
20260.370.170.58
20270.380.170.58
20280.380.170.59
20290.390.180.59

Routes In Northern Rockies

Routes recording Williamson's Sapsucker in Northern Rockies.
OchocoOREGON91982
Hash RockOREGON92024
Omak CreekWASHINGTON92024
SilviesOREGON82024
GreenoughMONTANA72004
Greenoagh 2MONTANA72011
BarnhouseOREGON72024
Silver CreekOREGON62024
Spring LakeWASHINGTON62024
CloverlandWASHINGTON62024
DesolationOREGON52007
Donelly 2OREGON52024
PierceIDAHO42003
LogdellOREGON42022
Mount VernonOREGON42024
Sawtooth City 2IDAHO32019
St RegisMONTANA31982
AlbeeOREGON32023
AveryIDAHO21991
Lolo PassIDAHO22007
AlturasIDAHO21985
CoolinIDAHO22018
CabartonIDAHO22003
Sawtooth CtyIDAHO22013
BurgdorfIDAHO22000

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