BirdAnalyst
Species · BCR 12 · BBS 2025 Release · 1966–2024

Lark Sparrow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGrassland birds

Lark Sparrow in Boreal Hardwood Transition has risen sharply: up 62% on the route-weighted index since 1985.

+62%Since 1985
8Routes In Region
20Years

Notable Signals

No notable trend signals for Lark Sparrow in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Lark Sparrow in Boreal Hardwood Transition is projected to fall about 41% by 2028 — from 0.09 in 2023 to a central estimate of 0.05 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±168.8%, with 100% of held-out values landing inside the 95% band.

-41%Change by 2028
0.05Projected 2028 index
0.00–0.1095% range
±168.8%Backtest error
19832028
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
20240.050.000.10
20250.050.000.10
20260.050.000.10
20270.050.000.10
20280.050.000.10

Routes In Boreal Hardwood Transition

Routes recording Lark Sparrow in Boreal Hardwood Transition.
Union TwpWISCONSIN62023
LudeMINNESOTA11988
NebishMINNESOTA11995
Tamarac NwrMINNESOTA11992
MinongWISCONSIN12011
Grand ViewWISCONSIN11994
MontrealWISCONSIN11984
BashawWISCONSIN12023

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