BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

MacGillivray's Warbler In Badlands and Prairies

All regionsBadlands and PrairiesForest birds

MacGillivray's Warbler in Badlands and Prairies has surged: up 204% on the route-weighted index since 1978.

+204%Since 1978
17Routes In Region
47Years

Notable Signals

long arc increasecomputed index

MacGillivray's Warbler has surged in Badlands and Prairies: up 204% on the route-weighted index since 1978.

Forecast

If the recent trend holds, MacGillivray's Warbler in Badlands and Prairies is projected to stay roughly flat through 2029, near 0.28 (95% range 0.07–0.48). A 5-year backtest shows a typical error of ±95.7%, with 80% of held-out values landing inside the 95% band.

+7%Change by 2029
0.28Projected 2029 index
0.07–0.4895% range
±95.7%Backtest error
19762029
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
20250.270.060.47
20260.270.070.47
20270.270.070.47
20280.270.070.47
20290.280.070.48

Routes In Badlands and Prairies

Routes recording MacGillivray's Warbler in Badlands and Prairies.
MoskeeWYOMING112001
Moskee 3WYOMING82024
Moskee 2WYOMING52019
Long DrawSOUTH-DAKOTA42024
SundanceWYOMING42024
RochfordSOUTH-DAKOTA32018
Maynard CouleeMONTANA22024
EnglewoodSOUTH-DAKOTA22021
NorbeckSOUTH-DAKOTA22000
Two DotMONTANA11976
Roubaix LkSOUTH-DAKOTA11981
Hill CitySOUTH-DAKOTA12013
Black FoxSOUTH-DAKOTA12017
Silver CitySOUTH-DAKOTA12002
HazelrodtSOUTH-DAKOTA12001
Lightning CrSOUTH-DAKOTA12009
DaytonWYOMING11981

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