BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Least Flycatcher In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieAerial insectivores

Least Flycatcher in Eastern Tallgrass Prairie has fallen sharply: down 71% on the route-weighted index since 1969.

-71%Since 1969
66Routes In Region
52Years

Notable Signals

No notable trend signals for Least Flycatcher in Eastern Tallgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Least Flycatcher in Eastern Tallgrass Prairie is projected to stay roughly flat through 2027, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±63.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027
0.01Projected 2027 index
0.00–0.0395% range
±63.1%Backtest error
19672027
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
20230.010.000.03
20240.010.000.03
20250.010.000.03
20260.010.000.03
20270.010.000.03

Routes In Eastern Tallgrass Prairie

Routes recording Least Flycatcher in Eastern Tallgrass Prairie.
ChandlervillILLINOIS22002
MartinsvilleILLINOIS21983
AldenILLINOIS22019
ExlineIOWA21996
BedfordIOWA21972
PiersonIOWA21976
Mill CreekILLINOIS11984
HolcombILLINOIS11983
BarringtonILLINOIS11967
ItascaILLINOIS11997
GeneseoILLINOIS12017
StreatorILLINOIS11974
WayneILLINOIS12012
SherburnvillILLINOIS11967
New LenoxILLINOIS11982
WilliamsfldILLINOIS12011
Deer CreekILLINOIS12001
MackinawILLINOIS11971
DaileyILLINOIS12003
MilfordILLINOIS12001
MelroseILLINOIS11994
Bluff SpgsILLINOIS11971
ConcordILLINOIS11995
BelleviewILLINOIS12005
FairlandILLINOIS11995

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