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

Franklin's Gull In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWetland birds

Franklin's Gull in Boreal Hardwood Transition has collapsed: down 81% on the route-weighted index since 1994.

-81%Since 1994
3Routes In Region
18Years

Notable Signals

long arc declinecomputed index

Franklin's Gull has collapsed in Boreal Hardwood Transition: down 81% on the route-weighted index since 1994.

Forecast

If the recent trend holds, Franklin's Gull in Boreal Hardwood Transition is projected to fall about 52% by 2027 — from 0.21 in 2022 to a central estimate of 0.10 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±340.8%, with 100% of held-out values landing inside the 95% band.

-52%Change by 2027
0.10Projected 2027 index
0.00–1.095% range
±340.8%Backtest error
19822027
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
20230.170.001.1
20240.150.001.1
20250.130.001.1
20260.120.001.0
20270.100.001.0

Routes In Boreal Hardwood Transition

Routes recording Franklin's Gull in Boreal Hardwood Transition.
WarroadMINNESOTA122022
LudeMINNESOTA42022
GreenbushMINNESOTA12018

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