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

Mute Swan Population Trend in Pennsylvania

All statesWaterfowl

Mute Swan in Pennsylvania has increased: up 47% on the route-weighted index since 1984.

+47%Since 1984
12Routes In State
27Years

Notable Mute Swan Trends in Pennsylvania

No notable trend signals for Mute Swan in Pennsylvania. See the full index history below.

Mute Swan Population Forecast in Pennsylvania

If the recent trend holds, Mute Swan in Pennsylvania is projected to stay roughly flat through 2028, near 0.05 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±72.2%, with 100% of held-out values landing inside the 95% band.

+6%Change by 2028
0.05Projected 2028 index
0.00–0.1195% range
±72.2%Backtest error
19822028
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
20270.050.000.11
20280.050.000.11

Mute Swan Survey Routes in Pennsylvania

Routes recording Mute Swan in Pennsylvania.
Clearfield420161990
Drehersville 2320232023
Slippery Rk219821982
Doe Run220082006
Wild Creek220012001
Mt Gretna 2220062006
Wakena220232003
Harmonsburg120162016
Greentown119901983
Elizabethvil120082003
New Ringgold120152015
Schaefferstown 2120172002

Mute Swan Population Trend in Other States

californiaconnecticutdelawareillinoisindianakentuckymarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorkohiorhode-islandvirginiawisconsin

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