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

Bobolink In Northern Rockies

All regionsNorthern RockiesGrassland birds

Bobolink in Northern Rockies has surged: up 134% on the route-weighted index since 1970.

+134%Since 1970
53Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Bobolink has surged in Northern Rockies: up 134% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Bobolink in Northern Rockies is projected to fall about 37% by 2029 — from 0.64 in 2024 to a central estimate of 0.40 (95% range 0.02–0.79). A 5-year backtest shows a typical error of ±39.9%, with 80% of held-out values landing inside the 95% band.

-37%Change by 2029
0.40Projected 2029 index
0.02–0.7995% range
±39.9%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
20250.400.020.79
20260.400.020.79
20270.400.020.79
20280.400.020.79
20290.400.020.79

Routes In Northern Rockies

Routes recording Bobolink in Northern Rockies.
RaynesfordMONTANA452024
SulaMONTANA92024
Wolf CreekMONTANA72019
AugustaMONTANA62024
VictorMONTANA52024
CoolinIDAHO42024
Willow CreekMONTANA41981
Fort LoganMONTANA42024
WickiupOREGON42003
BridgeportOREGON42022
NaplesIDAHO32024
CabartonIDAHO32023
EllistonMONTANA32024
BoulderMONTANA32024
Saleratus CrUTAH31997
LaurierWASHINGTON31995
MidvaleWYOMING31975
TensleepWYOMING32023
MaybellCOLORADO22017
Browns ParkCOLORADO21995
LaurelMONTANA22022
Pablo Res.MONTANA22023
GlenMONTANA22022
PhilipsburgMONTANA22024
Threemile WaMONTANA22024

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