BirdAnalyst
Species · BCR 2 · BBS 2025 Release · 1966–2024

White-crowned Sparrow In BCR 2

All regionsBCR 2Generalists

White-crowned Sparrow in BCR 2 has surged: up 105% on the route-weighted index since 1987.

+105%Since 1987
20Routes In Region
34Years

Notable Signals

long arc increasecomputed index

White-crowned Sparrow has surged in BCR 2: up 105% on the route-weighted index since 1987.

Forecast

If the recent trend holds, White-crowned Sparrow in BCR 2 is projected to rise about 106% by 2029 — from 14 in 2024 to a central estimate of 29 (95% range 16–41). A 5-year backtest shows a typical error of ±73.4%, with 20% of held-out values landing inside the 95% band.

+106%Change by 2029
29Projected 2029 index
16–4195% range
±73.4%Backtest error
19842029
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
2025271540
2026281540
2027281640
2028281641
2029291641

Routes In BCR 2

Routes recording White-crowned Sparrow in BCR 2.
King SalmonALASKA482024
St. Mary'SALASKA382014
Katmai N.P.ALASKA362022
KotzebueALASKA342024
DillinghamALASKA282019
Dillingham (Short)ALASKA241984
Kotzebue (Short)ALASKA191994
Selawik (Short)ALASKA161987
NomeALASKA152023
Salmon LakeALASKA142024
Kugarak (Short)ALASKA121987
Cape NomeALASKA102024
TellerALASKA92024
Goodnews BayALASKA92004
CouncilALASKA72024
Cold BayALASKA32024
Gweek RiverALASKA32002
TupuknukALASKA31995
Kanektok RivALASKA22004
Togiak RiverALASKA12005

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