BirdAnalyst
Species · BCR 13 · BBS 2025 Release · 1966–2024

Mute Swan In Lower Great Lakes / St. Lawrence Plain

All regionsLower Great Lakes / St. Lawrence PlainWaterfowl

Mute Swan in Lower Great Lakes / St. Lawrence Plain has fallen sharply: down 61% on the route-weighted index since 1994.

-61%Since 1994TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
6Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
17YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Mute Swan in Lower Great Lakes / St. Lawrence Plain. See the full index history below.

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Mute Swan in Lower Great Lakes / St. Lawrence Plain.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
WaylandOHIO22005
HiramOHIO22006
Slippery RkPENNSYLVANIA21982
HighlandNEW-YORK12009
HopkintonNEW-YORK12006
HarmonsburgPENNSYLVANIA12016

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