A pair of mute swans, Cygnus olor, courting in spring
Mute swans are an introduced species in North America, and in some regions they are considered invasive, although they are still protected in many areas.
A pair of mute swans, Cygnus olor, courting in spring |
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Mute swans are an introduced species in North America, and in some regions they are considered invasive, although they are still protected in many areas. |
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