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

Prairie Falcon In Northern Rockies

All regionsNorthern RockiesGeneralists

Prairie Falcon in Northern Rockies has surged: up 146% on the route-weighted index since 1974.

+146%Since 1974
108Routes In Region
52Years

Notable Signals

long arc increasecomputed index

Prairie Falcon has surged in Northern Rockies: up 146% on the route-weighted index since 1974.

Forecast

If the recent trend holds, Prairie Falcon in Northern Rockies is projected to stay roughly flat through 2029, near 0.09 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±21%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029
0.09Projected 2029 index
0.00–0.1895% range
±21%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
20250.090.000.18
20260.090.000.18
20270.090.000.18
20280.090.000.18
20290.090.000.18

Routes In Northern Rockies

Routes recording Prairie Falcon in Northern Rockies.
UnityOREGON31992
Rock RiverWYOMING31999
BeaverheadMONTANA22023
Malheur Res.OREGON22023
TwickenhamOREGON22024
MidvaleWYOMING22022
ClarkWYOMING22002
LovellWYOMING22000
Rock SpringsWYOMING22021
MaybellCOLORADO12022
LayCOLORADO12024
ChallisIDAHO11985
Sawtooth CtyIDAHO12011
Crane CreekIDAHO12009
St MaryMONTANA12001
St RegisMONTANA12007
PolsonMONTANA12022
AugustaMONTANA12017
EllistonMONTANA11998
BoulderMONTANA12018
ChestnutMONTANA11968
LaurelMONTANA12013
Red RockMONTANA12022
Pablo Res.MONTANA12015
Wise RiverMONTANA12014

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