BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Franklin's Gull In Badlands and Prairies

All regionsBadlands and PrairiesWetland birds

Franklin's Gull in Badlands and Prairies has collapsed: down 96% on the route-weighted index since 1970.

-96%Since 1970
23Routes In Region
28Years

Notable Signals

long arc declinecomputed index

Franklin's Gull has collapsed in Badlands and Prairies: down 96% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Franklin's Gull in Badlands and Prairies is projected to rise about 11× by 2029 — from 0.13 in 2024 to a central estimate of 1.4 (95% range 0.00–6.4). A 5-year backtest shows a typical error of ±245.2%, with 80% of held-out values landing inside the 95% band.

11×Change by 2029
1.4Projected 2029 index
0.00–6.495% range
±245.2%Backtest error
19682029
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
20251.40.006.3
20261.40.006.4
20271.40.006.4
20281.40.006.4
20291.40.006.4

Routes In Badlands and Prairies

Routes recording Franklin's Gull in Badlands and Prairies.
HighwoodMONTANA9002016
Fort PierreSOUTH-DAKOTA1001998
ChamberlainSOUTH-DAKOTA442011
Dunn CenterNORTH-DAKOTA201968
DickinsonNORTH-DAKOTA92013
RoundupMONTANA62024
Wheat BasinMONTANA62023
CircleMONTANA31993
TobaccoNORTH-DAKOTA31993
Ft ThompsonSOUTH-DAKOTA31990
LeroyMONTANA22024
LaplantSOUTH-DAKOTA21990
Cedar PassSOUTH-DAKOTA22002
JordanMONTANA12016
Two DotMONTANA12000
ShawmutMONTANA12024
ForsythMONTANA11994
Maynard CouleeMONTANA12023
BowmanNORTH-DAKOTA11973
GorhamNORTH-DAKOTA12002
Glen UllinNORTH-DAKOTA11990
S. PioneerSOUTH-DAKOTA12022
BillWYOMING11999

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