BirdAnalyst
Species · BCR 4 · BBS 2025 Release · 1966–2024

Olive-sided Flycatcher In BCR 4

All regionsBCR 4Aerial insectivores

Olive-sided Flycatcher in BCR 4 has risen sharply: up 50% on the route-weighted index since 1982.

+50%Since 1982
60Routes In Region
44Years

Notable Signals

long arc increasecomputed index

Olive-sided Flycatcher has risen sharply in BCR 4: up 50% on the route-weighted index since 1982.

Forecast

If the recent trend holds, Olive-sided Flycatcher in BCR 4 is projected to rise about 15% by 2029 — from 2.3 in 2024 to a central estimate of 2.6 (95% range 1.1–4.1). A 5-year backtest shows a typical error of ±12.6%, with 100% of held-out values landing inside the 95% band.

+15%Change by 2029
2.6Projected 2029 index
1.1–4.195% range
±12.6%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
20252.61.14.1
20262.61.14.1
20272.61.14.1
20282.61.14.1
20292.61.14.1

Routes In BCR 4

Routes recording Olive-sided Flycatcher in BCR 4.
Kanuti LakeALASKA202024
Bear CreekALASKA91991
CircleALASKA82024
L SalchaALASKA82023
Seven LakesALASKA82023
ColdfootALASKA82021
ChistochinaALASKA72022
Swan Lake RdALASKA72023
NorthwayALASKA62023
Goose BayALASKA61982
KalifonskyALASKA62023
Unalakleet RiverALASKA62024
Nabesna RoadALASKA62021
Skilak LakeALASKA51985
TonsinaALASKA52021
Nicholai SlALASKA52024
Manley Ht SpALASKA52022
Anvik RiverALASKA52022
EagleALASKA42024
HomerALASKA41982
Burma RoadALASKA42024
Kanuti CanynALASKA42024
McgrathALASKA42022
Moose CreekALASKA42022
Galena (Short)ALASKA42024

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