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

Bobolink In Great Basin

All regionsGreat BasinGrassland birds

Bobolink in Great Basin has risen sharply: up 54% on the route-weighted index since 1977.

+54%Since 1977
19Routes In Region
48Years

Notable Signals

long arc increasecomputed index

Bobolink has risen sharply in Great Basin: up 54% on the route-weighted index since 1977.

Forecast

If the recent trend holds, Bobolink in Great Basin is projected to rise about 74% by 2029 — from 0.06 in 2024 to a central estimate of 0.10 (95% range 0.00–0.24). A 5-year backtest shows a typical error of ±99.5%, with 100% of held-out values landing inside the 95% band.

+74%Change by 2029
0.10Projected 2029 index
0.00–0.2495% range
±99.5%Backtest error
19742029
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
20250.100.000.24
20260.100.000.24
20270.100.000.24
20280.100.000.24
20290.100.000.24

Routes In Great Basin

Routes recording Bobolink in Great Basin.
NighthawkWASHINGTON92016
Fish LakeOREGON62024
JosephOREGON42016
BatesIDAHO32018
AlmoIDAHO32000
SpringfieldIDAHO22004
PocatelloIDAHO21996
PrincetonOREGON21985
Goose Creek Mtn.UTAH22023
CedarvilleCALIFORNIA12016
BakerIDAHO12024
LeadoreIDAHO11981
CratersIDAHO11989
Dougal ResIDAHO11993
Cedar HillIDAHO12019
RanchograndeNEVADA12024
BlitzenOREGON11987
Timpie SpgUTAH11988
TonasketWASHINGTON12013

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