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

Savannah Sparrow In BCR 4

All regionsBCR 4Grassland birds

Savannah Sparrow in BCR 4 has fallen sharply: down 66% on the route-weighted index since 1977.

-66%Since 1977
63Routes In Region
46Years

Notable Signals

long arc declinecomputed index

Savannah Sparrow has fallen sharply in BCR 4: down 66% on the route-weighted index since 1977.

Forecast

If the recent trend holds, Savannah Sparrow in BCR 4 is projected to fall about 37% by 2029 — from 4.9 in 2024 to a central estimate of 3.1 (95% range 0.00–10). A 5-year backtest shows a typical error of ±20.8%, with 100% of held-out values landing inside the 95% band.

-37%Change by 2029
3.1Projected 2029 index
0.00–1095% range
±20.8%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
20253.80.0011
20263.60.0011
20273.50.0011
20283.30.0010
20293.10.0010

Routes In BCR 4

Routes recording Savannah Sparrow in BCR 4.
ToklatALASKA582024
WasillaALASKA411983
SavageALASKA372024
HomerALASKA311982
MonahanALASKA162021
KalifonskyALASKA152023
MaclarenALASKA132024
DeltaALASKA132024
CantwellALASKA112021
Skilak LakeALASKA111985
Goose BayALASKA101982
SourdoughALASKA92024
Pinoche Tral (Short)ALASKA91984
CottonwoodALASKA71990
Ft. RichrdsnALASKA72023
Caribou Mtn.ALASKA62024
Hather CreekALASKA62024
McgrathALASKA62022
Kenny LakeALASKA52024
PetersvilleALASKA52024
TonsinaALASKA42021
CohoeALASKA42023
Galena (Short)ALASKA42024
CircleALASKA32019
ChistochinaALASKA32024

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