BirdAnalyst
Species · BCR 19 · BBS 2025 Release · 1966–2024

Trumpeter Swan In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieWaterfowl

Trumpeter Swan in Central Mixed Grass Prairie has declined: down 37% on the route-weighted index since 1994.

-37%Since 1994
6Routes In Region
23Years

Notable Signals

No notable trend signals for Trumpeter Swan in Central Mixed Grass Prairie. See the full index history below.

Forecast

If the recent trend holds, Trumpeter Swan in Central Mixed Grass Prairie is projected to stay roughly flat through 2029, near 0.06 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±130.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.06Projected 2029 index
0.00–0.1195% range
±130.3%Backtest error
19832029
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
20250.060.000.11
20260.060.000.11
20270.060.000.11
20280.060.000.11
20290.060.000.11

Routes In Central Mixed Grass Prairie

Routes recording Trumpeter Swan in Central Mixed Grass Prairie.
GordonNEBRASKA32005
Piester LakeNEBRASKA22024
MullenNEBRASKA22023
Swan LakeNEBRASKA12015
BrownleeNEBRASKA12017
NenzelNEBRASKA12022

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