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

Boreal Chickadee In BCR 4

All regionsBCR 4Forest birds

Boreal Chickadee in BCR 4 has surged: up 137% on the route-weighted index since 1978.

+137%Since 1978
61Routes In Region
45Years

Notable Signals

long arc increasecomputed index

Boreal Chickadee has surged in BCR 4: up 137% on the route-weighted index since 1978.

Forecast

If the recent trend holds, Boreal Chickadee in BCR 4 is projected to rise about 36% by 2029 — from 1.5 in 2024 to a central estimate of 2.1 (95% range 1.1–3.1). A 5-year backtest shows a typical error of ±18.7%, with 100% of held-out values landing inside the 95% band.

+36%Change by 2029
2.1Projected 2029 index
1.1–3.195% range
±18.7%Backtest error
19752029
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
20252.01.03.0
20262.01.03.0
20272.01.13.0
20282.11.13.0
20292.11.13.1

Routes In BCR 4

Routes recording Boreal Chickadee in BCR 4.
SlanaALASKA92024
KuskulanaALASKA92024
Kanuti LakeALASKA82024
Birch LakeALASKA72021
ChistochinaALASKA62024
ChickenALASKA62023
DeltaALASKA62024
TatalinaALASKA62019
Swan Lake RdALASKA52023
HomerALASKA41982
Chena RiverALASKA41988
Nicholai SlALASKA42019
Tower BluffsALASKA32023
NorthwayALASKA32023
Skilak LakeALASKA31985
WillowALASKA32022
SavageALASKA32024
Anchor RiverALASKA32024
Moose CreekALASKA32022
Murphy DomeALASKA32023
Ft. RichrdsnALASKA32022
Mccarthy Rd2ALASKA32024
Chatanika RALASKA22023
LivengoodALASKA22021
NebesnaALASKA21975

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