Jack Dykinga / Blue Hen Falls with Sugar Maples (Acer saccharum) and American Beech trees (Fagus grandifolia), Cuyahoga Valley National Park, Ohio

Jeff Foott / Sugar Maple (Acer saccharum) trees in autumn, Acadia National Park, Maine

Jeff Foott / Sugar Maple (Acer saccharum) trees in autumn, Acadia National Park, Maine

Jeff Foott / Sugar Maple (Acer saccharum) in autumn, Acadia National Park, Maine

Scott Leslie / Sugar Maple (Acer saccharum) trees in autumn, Mount Carleton Provincial Park, New Brunswick, Canada

Scott Leslie / Sugar Maple (Acer saccharum) old-growth grove, Cape Breton Highlands National Park, Nova Scotia, Canada

Jack Dykinga / Autumnal landscape with Sugar maple (Acer saccharum) and American beech (Fagus grandifolia) forest, and Blue Hen Falls, Cuyahoga Valley National Park, Ohio, USA, October 2006.

Doug Wechsler / Close-up of a Sugar maple leaf (Acer saccharinum), Pennsylvania, USA, October.

Scott Leslie / Sugar Maple (Acer saccharum) seedling growing beneath old-growth Canadian Hemlock (Tsuga canadensis), Nova Scotia, Canada

LYNN M. STONE / Guernsey Cow standing in autumn pasture by Sugar Maple tree, autumn, Connecticut, USA

LYNN M. STONE / Guernsey cow chewing cud, in pasture, backed by Sugar Maple tree, autumn, Connecticut, USA

LYNN M. STONE / Guernsey cow chewing cud, in pasture, with Sugar Maple tree in background, October, Connecticut, USA