BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Williamson's Sapsucker In Great Basin

All regionsGreat BasinForest birds

Williamson's Sapsucker in Great Basin has surged: up 201% on the route-weighted index since 1971.

+201%Since 1971
38Routes In Region
54Years

Notable Signals

long arc increasecomputed index

Williamson's Sapsucker has surged in Great Basin: up 201% on the route-weighted index since 1971.

Forecast

If the recent trend holds, Williamson's Sapsucker in Great Basin is projected to rise about 32% by 2029 — from 0.19 in 2024 to a central estimate of 0.25 (95% range 0.14–0.37). A 5-year backtest shows a typical error of ±25.9%, with 100% of held-out values landing inside the 95% band.

+32%Change by 2029
0.25Projected 2029 index
0.14–0.3795% range
±25.9%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
20250.240.120.35
20260.240.130.36
20270.250.130.36
20280.250.140.36
20290.250.140.37

Routes In Great Basin

Routes recording Williamson's Sapsucker in Great Basin.
Barnes ValOREGON111987
SistersOREGON62024
LakeviewOREGON52024
CarltonWASHINGTON52022
Blewett PassWASHINGTON52024
Wizard FallsOREGON42018
E. Mt. AdamsWASHINGTON42024
HackamoreCALIFORNIA32010
Crowley LakeCALIFORNIA22016
Davis LakeOREGON22024
Badger CreekOREGON22023
NubieberCALIFORNIA12002
Davis CreekCALIFORNIA11994
MacdoelCALIFORNIA12011
CedarvilleCALIFORNIA12015
BartleCALIFORNIA12019
TionestaCALIFORNIA12021
Medicine Mtn.CALIFORNIA12021
Magic MtnIDAHO12024
JarbidgeNEVADA12014
Comins LakeNEVADA12008
Dell SpringOREGON11999
Modoc PointOREGON12000
PaisleyOREGON12023
Camp ShermanOREGON11994

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