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

Fox Sparrow In BCR 4

All regionsBCR 4Generalists

Fox Sparrow in BCR 4 has declined: down 38% on the route-weighted index since 1976.

-38%Since 1976
66Routes In Region
46Years

Notable Signals

No notable trend signals for Fox Sparrow in BCR 4. See the full index history below.

Forecast

If the recent trend holds, Fox Sparrow in BCR 4 is projected to rise about 45% by 2029 — from 12 in 2024 to a central estimate of 17 (95% range 7.6–26). A 5-year backtest shows a typical error of ±57.6%, with 80% of held-out values landing inside the 95% band.

+45%Change by 2029
17Projected 2029 index
7.6–2695% range
±57.6%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
2025167.125
2026167.226
2027177.426
2028177.526
2029177.626

Routes In BCR 4

Routes recording Fox Sparrow in BCR 4.
Goose BayALASKA481982
Anvik RiverALASKA462024
KachemakALASKA362024
MonahanALASKA352021
ToklatALASKA342024
CohoeALASKA332023
Anchor RiverALASKA322024
Koyukuk Riv.ALASKA322001
Mt. FairplayALASKA312024
DeltaALASKA282024
Mud RiverALASKA272024
Lake LouiseALASKA252014
TatalinaALASKA232019
Hather CreekALASKA222024
Caribou Mtn.ALASKA212024
Unalakleet RiverALASKA202024
EagleALASKA192024
Kobuk River (Short)ALASKA191992
Chatanika RALASKA172023
SavageALASKA172024
ChickenALASKA152024
HomerALASKA141982
ColdfootALASKA112024
RubyALASKA112024
MatanuskaALASKA101983

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