The Trumpeter Swan Society Restore - Expand - Protect - Advocate - Involve - Rebuild
Summer and winter ranges are currently expanding as recovering populations increase. Breeding distribution in North America is surveyed in detail every five years. Many states survey their breeding Trumpeters each fall and some conduct winter distribution surveys, however few detailed range maps exist.
Breeding Distribution of Management Populations, from 2005 North American Trumpeter Swan Survey
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Seasonal Distribution of Management Populations (1996)