Stephen Dalton / Triangle web spider (Hyptiotes paradoxus) showing web collapsing as it is reingested, UK, Uloboridae

Scott Leslie / Jigging Cove Lake, Cape Breton Highlands National Park, Nova Scotia, Canada

Theo Allofs / Autumn in the Ogilvie Mountains and boreal forest near the Dempster Highway, Yukon, Canada

Tim Fitzharris / Island in Georgian Bay, Lake Huron, Killarney Provincial Park, Ontario, Canada

Scott Leslie / Waterfall in autumn, Nova Scotia, Canada

Scott Leslie / Upper Bear River in early autumn, Nova Scotia, Canada

Scott Leslie / Upper Bear River in early autumn, Nova Scotia, Canada

Scott Leslie / Common Yellowthroat (Geothlypis trichas) juvenile in autumn, Canada

Scott Leslie / Fall color water reflections, Mersey River, Kejimkujik National Park, Nova Scotia, Canada

Scott Leslie / Forest in fall colors along lake, Kejimjujik National Park, Nova Scotia, Canada

Tim Fitzharris / Autumn reflection on Marsh's Lake, Spruce Woods Provincial Park, Canada

Tim Fitzharris / Autumn reflection on Marsh's Lake, Spruce Woods Provincial Park, Canada

Tim Fitzharris / Autumn reflection on Marsh's Lake, Spruce Woods Provincial Park, Canada

Scott Leslie / Mersey River in fall, Kejimkujik National Park, Nova Scotia, Canada

Scott Leslie / Mersey River in fall, Kejimkujik National Park, Nova Scotia, Canada

Scott Leslie / MacKenzie River valley, Cape Breton Highlands National Park, Nova Scotia, Canada

Scott Leslie / MacKenzie River valley, Cape Breton Highlands National Park, Nova Scotia, Canada

Scott Leslie / Autumn foliage, Cape Breton Highlands National Park with Gulf of St. Lawrence in background, Nova Scotia, Canada

Scott Leslie / Road in deciduous forest, Cape Breton Highlands National Park, Nova Scotia, Canada

Theo Allofs / Autumn colors along the North Canol Road, Yukon Territory, Canada

Theo Allofs / Lapie River winding through forest in autumn, Canada

Theo Allofs / Lapie River winding through boreal forest in autumn, Canada

Theo Allofs / Dragon Lake and boreal forest in autumn, Yukon Territory, Canada

Theo Allofs / Recreational vehicle driving on the Top of the World Highway between Dawson City, Yukon, and Tok, Alaska

Theo Allofs / View from North Fork Pass towards Tombstone Mountains, Canada

Theo Allofs / Cloud in blue sky above mountain in autumn colors, Yukon, Canada

Theo Allofs / Autumn in the Ogilvie Mountains near the Dempster Highway, Yukon, Canada

Theo Allofs / Autumn in the Ogilvie Mountains near the Dempster Highway, Yukon, Canada

Theo Allofs / Reflection of clouds in small lake along boreal forest, Ogilvie Mountains, Yukon, Canada

Mark Raycroft / Welsh Corgi (Canis familiaris) puppies in autumn

Tim Fitzharris / Fall colors, Chic-Chocs, Quebec, Canada

Tim Fitzharris / Tobique River, New Brunswick, Canada

Tim Fitzharris / Autumn colors, Killarney Provincial Park, Ontario, Canada

Tim Fitzharris / Beaver pond amid boreal forest, Tombstone Territorial Park, Yukon Territory, Canada

Tim Fitzharris / Autumn tundra with boreal forest, Tombstone Territorial Park, Yukon Territory, Canada

Tim Fitzharris / Lang Lake, fall colors, Ontario, Canada

Yva Momatiuk & John Eastcott / Kettle pond on autumn tundra, Richardson Mountain, Yukon, Canada

Yva Momatiuk & John Eastcott / Cumulus clouds over autumn tundra, Dempster Highway, Yukon, Canada

Yva Momatiuk & John Eastcott / Changing autumn foliage on mountain slope, Gaspesie National Park, Gaspesie Peninsula, Quebec, Canada

Yva Momatiuk & John Eastcott / New vegetation among burned stumps in old logged coniferous forest, British Columbia, Canada

Tim Fitzharris / Purcell Mountain and Lussier River, British Columbia, Canada

Yva Momatiuk & John Eastcott / Great Gray Owl (Strix nebulosa) perched in tree in boreal forest, autumn, northern British Columbia, Canada

Tui De Roy / Tundra bog in autumn, Saglek coast, Labrador Bay, Newfoundland, Canada

Tui De Roy / Tundra bog in autumn colors, Saglek Bay, Labrador Coast, Newfoundland, Canada

Tui De Roy / Tundra bog in autumn colors, Saglek Bay, Labrador Coast, Newfoundland, Canada

Scott Leslie / Waterfall in autumn, Nova Scotia, Canada

Scott Leslie / Road in autumn foliage, Kejimkujik National Park, Nova Scotia, Canada

Scott Leslie / Forest in fall colors along lake, Kejimjujik National Park, Nova Scotia, Canada

Theo Allofs / Autumn colors on burned hills along the Top of the World Highway between Dawson City, Yukon, and Tok, Alaska

Yva Momatiuk & John Eastcott / Cumulus clouds near Wright Pass, autumn, Northwest Territory, Canada