BirdAnalyst
Species · Utah · BBS 2025 Release · 1966–2024

Franklin's Gull Population Trend in Utah

All statesWetland birds

Franklin's Gull in Utah has fallen sharply: down 63% on the route-weighted index since 1972.

-63%Since 1972
13Routes In State
36Years

Notable Franklin's Gull Trends in Utah

long arc declinecomputed index

Franklin's Gull has fallen sharply in Utah: down 63% on the route-weighted index since 1972.

Franklin's Gull Population Forecast in Utah

If the recent trend holds, Franklin's Gull in Utah is projected to fall about 100% by 2029 — from 13 in 2024 to a central estimate of 0.00 (95% range 0.00–17). A 5-year backtest shows a typical error of ±786.9%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–1795% range
±786.9%Backtest error
19692029
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
20250.000.0017
20260.000.0017
20270.000.0017
20280.000.0017
20290.000.0017

Franklin's Gull Survey Routes in Utah

Routes recording Franklin's Gull in Utah.
Promontory74120241969
Bear River30420231992
Delta4320041997
Saleratus Cr3920072007
Johnson Can3019921992
Kamas320002000
Lost Cr. Res220002000
Crawford Mts220022002
Neponset Res120032001
Woodruff120242008
Snowville120162016
Randolph120211993
Callao120242006

Franklin's Gull Population Trend in Other States

californiaidahokansasminnesotamontananebraskanorth-dakotaoregonsouth-dakotawyoming

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