The Wye Marsh Wildlife Centre runs a breeding programme for trumpeter swans.
 The centre, and its volunteers, monitor approximately one-third of all trumpeter swans in Ontario.
 The swans had been absent from the marsh until a reintroduction programme by Harry Lumsden in the 1980s, as an employee of the Ontario Department of Natural Resources.
 Archeological evidence collected by Jesuit missionaries in the 17th century suggests that the area previously had significant concentrations of trumpeter swans, and historical references indicate the same.
 While hunters armed only with bows and arrows would have had a difficult time hunting the swan, the introduction of firearms by European explorers would have made the swan a tempting target for hunters.
 By 1850, only small numbers of the swan remained in Eastern Canada, and the last sighting of a trumpeter swan in Ontario before reintroduction occurred in 1884.
 Among Ontarians, the Wye Marsh Wildlife Centre has is known as the Home of the Trumpeter Swan.

The marsh is also an important breeding site for black terns and least bitterns.
 At least 1% of the breeding pairs of least bitterns in Canada nest in the Wye Marsh.

Other bird species known to inhabit the marsh include: red-winged blackbirds, common grackles, brown-headed cowbirds, sandhill cranes, common mergansers, double-crested cormorants, great blue herons, marsh wrens, tree swallows, common yellowthroats, ring-billed gulls, common moorhens, mallard ducks, wood ducks, Canada geese, barn swallows and soras.

Historically, the marsh supported large amounts of wild rice, which served as an important food source for waterfowl.
 The introduction of carp in the early 20th century significantly reduced the amount of wild rice, and consequently the number of waterfowl.
The Wye Marsh Wildlife Centre runs a breeding programme for trumpeter swans.  The centre, and its volunteers, monitor approximately one-third of all trumpeter swans in Ontario.  The swans had been absent from the marsh until a reintroduction programme by Harry Lumsden in the 1980s, as an employee of the Ontario Department of Natural Resources.  Archeological evidence collected by Jesuit missionaries in the 17th century suggests that the area previously had significant concentrations of trumpeter swans, and historical references indicate the same.  While hunters armed only with bows and arrows would have had a difficult time hunting the swan, the introduction of firearms by European explorers would have made the swan a tempting target for hunters.  By 1850, only small numbers of the swan remained in Eastern Canada, and the last sighting of a trumpeter swan in Ontario before reintroduction occurred in 1884.  Among Ontarians, the Wye Marsh Wildlife Centre has is known as the Home of the Trumpeter Swan.
The marsh is also an important breeding site for black terns and least bitterns.  At least 1% of the breeding pairs of least bitterns in Canada nest in the Wye Marsh.
Other bird species known to inhabit the marsh include: red-winged blackbirds, common grackles, brown-headed cowbirds, sandhill cranes, common mergansers, double-crested cormorants, great blue herons, marsh wrens, tree swallows, common yellowthroats, ring-billed gulls, common moorhens, mallard ducks, wood ducks, Canada geese, barn swallows and soras.
Historically, the marsh supported large amounts of wild rice, which served as an important food source for waterfowl.  The introduction of carp in the early 20th century significantly reduced the amount of wild rice, and consequently the number of waterfowl.
Wye Marsh