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Information iconMule deer bucks spar near Seedskadee National Wildlife Refuge in Wyoming. (Photo: Tom Koerner/USFWS)

Fall is a season of restlessness on national wildlife refuges. As daylight shrinks and the mercury drops, great flocks of ducks, geese and shorebirds start their migrations south and west. Monarch butterflies head for wintering sites in Mexico. Bull elk spar and compete for mates. Color and drama are everywhere.

North America’s Butterfly

Information iconMonarch butterflies feed as migration begins. Help save the monarch. (Photo: Karen Hofmann)