Matthias Breiter / Fog surrounding islands, Patos Island, San Juan Islands, Washington

Matthias Breiter / North American River Otter (Lontra canadensis) with crab prey, San Juan Island, Washington

Matthias Breiter / Orca (Orcinus orca) juvenile breaching, San Juan Island, Washington

Matthias Breiter / California Poppy (Eschscholzia californica) flowers, San Juan Islands, Washington

Matthias Breiter / Upper Cascade Falls, Moran State Park, Orcas Island, Washington

Matthias Breiter / Lower Cascade Falls, Moran State Park, Orcas Island, Washington

Oriol Alamany / Horse (Equus caballus) and tree silhouetted against the Pacific Ocean in the Northwest coast of Easter Island (Pascua or Rapa Nui), Unesco World Heritage Site, November 2004

Michael Durham / Townsend's Big-eared Bat (Corynorhinus townsendii) flying out of cave, Craters of the Moon National Monument, Oregon

Yva Momatiuk & John Eastcott / Ploughed wheat fields after harvest in autumn, Palouse Hills, Washington

Gerry Ellis / Selective logging forestry technique, Olympic National Forest, Washington

Gerry Ellis / Gypsy Moth (Lymantria dispar) collection containers, Olympic National Park, Washington

Gerry Ellis / Snow Leopard (Uncia uncia) pelt, Woodland Park Zoo, Washington

Gerry Ellis / Gray Mouse Lemur (Microcebus murinus) eating, Woodland Park Zoo, Seattle, Washington

James Christensen / John Day Dam, Columbia River, Oregon

James Christensen / Irrigation sprinkler in field, Enterprise, Oregon

James Christensen / Alder (Alnus sp ) forest with stream, Mount Rainier National Park, Washington

James Christensen / Western Yellow-bellied Racer (Coluber constrictor mormon) near Imnaha, Oregon

James Christensen / Great Basin Gopher Snake (Pituophis catenifer deserticola) in habitat, near Imnaha, Oregon

James Christensen / Northwestern Garter Snake (Thamnophis ordinoides) basking in subalpine habitat, Mount Rainier National Park, Washington

James Christensen / Columbia River, Crown Point State Park, Oregon

James Christensen / Northwestern Garter Snake (Thamnophis ordinoides) basking in subalpine habitat, Mount Rainier National Park, Washington

James Christensen / Mountain stream, Mount Rainier National Park, Washington

James Christensen / Sylvia Falls cascading in Steven's Woods, Mount Rainier National Park, Washington

Kevin Schafer / Seastacks and rugged Pacific coastline, Bandon, Oregon

Kevin Schafer / Latourell Falls in temperate rainforest, Columbia River Gorge, Oregon

Kevin Schafer / Panther Creek Falls in temperate rainforest, Gifford Pinchot National Forest, Washington

Kevin Schafer / Panther Creek Falls, Gifford Pinchot National Forest, Washington

Kevin Schafer / Silver Falls, Golden and Silver Falls State Natural Area, Mellicoma River, Oregon

Kevin Schafer / Pacific Rhododendron (Rhododendron macrophyllum) blooming in temperate rainforest, Mt. Walker, Olympic National Forest, Washington

Kevin Schafer / Bigleaf Maple (Acer macrophyllum) covered with moss and ferns, Hoh River Valley, Olympic National Park, Washington

Kevin Schafer / Pacific Rhododendron (Rhododendron macrophyllum) blooming in temperate rainforest, Mt. Walker, Olympic National Forest, Washington

Kevin Schafer / Bigleaf Maple (Acer macrophyllum) over Lake Crescent, Olympic National Park, Washington

Michael Durham / Red-legged Frog (Rana aurora) near Circle Creek along coast, Oregon

Michael Durham / Red-legged Frog (Rana aurora) near Circle Creek along coast, Oregon

Michael Durham / Red-legged Frog (Rana aurora) near Circle Creek along coast, Oregon

Michael Durham / Sagebrush Mariposa Lily (Calochortus macrocarpus) flower, central Washington

Michael Durham / Blue Damselfly (Argia vivida) resting on Salt Heliotrope (Heliotropium curassavicum), central Washington

Michael Durham / Pallid Bat (Antrozous pallidus) on rimrock at night, Washington

Michael Durham / Western Small-footed Myotis (Myotis ciliolabrum) bat launching into flight from a basalt rock, Dutch Henry Falls Preserve, central Washington

Michael Durham / Western Small-footed Myotis (Myotis ciliolabrum) bat flying at night, Washington

Michael Durham / Lodgepole Pine (Pinus contorta) dispersing pollen through wind, western Oregon

Michael Durham / Lodgepole Pine (Pinus contorta) dispersing pollen through wind, western Oregon

Michael Durham / Oregon Oak (Quercus garryana) in the Willamette Valley, Oregon

Michael Durham / Oregon Oak (Quercus garryana) in the Willamette Valley, Oregon

Michael Durham / Red-legged Frog (Rana aurora) female, western Oregon

Michael Durham / Pacific Trillium (Trillium ovatum) blooming in early spring, Oregon

Michael Durham / Pacific Trillium (Trillium ovatum) flower cross section showing the long stem, subterranean bulb and roots, Oregon

Michael Durham / Red-legged Frog (Rana aurora) jumping, Oregon

Michael Durham / Red-legged Frog (Rana aurora) female on moss, Oregon

Michael Durham / Red-legged Frog (Rana aurora) female, Oregon

Kevin Schafer / Western Pasqueflower (Anemone occidentalis), Paintbrush (Castilleja sp) and Lupine (Lupinus sp) wildflowers in summer with Mount Rainier in the background, Paradise Meadow, Mount Rainier National Park...

Kevin Schafer / Western Pasqueflower (Anemone occidentalis), Paintbrush (Castilleja sp) and Lupine (Lupinus sp) wildflowers in summer with Mount Rainier in the background, Paradise Meadow, Mount Rainier National Park...

Kevin Schafer / Sunbeam Falls, Mount Rainier National Park, Washington

Konrad Wothe / Domestic Horse (Equus caballus) group wrangled by cowboys, Oregon

Konrad Wothe / Moss-covered trees and dense undergrowth in the Hoh Temperate Rainforest, Olympic National Park, Washington

Konrad Wothe / Canada Jay (Perisoreus canadensis) in pine, Olympic National Park, Washington

Tim Fitzharris / Mount Rainier and Reflection Lake, Mount Rainier National Park, Washington

Tim Fitzharris / Fireweed (Chamerion angustifolium) flowering and Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Fireweed (Chamerion angustifolium) flowering and Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Wild Columbine (Aquilegia canadensis) flowers, Washington

Tim Fitzharris / Myrtle Falls and Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Wildflowers and Tatoosh Range, Mount Rainier National Park, Washington

Tim Fitzharris / Paradise Meadow and Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Mount Rainier and Reflection Lake, Mount Rainier National Park, Washington

Tim Fitzharris / Mount Rainier and Reflection Lake, Mount Rainier National Park, Washington

Tim Fitzharris / Paradise Meadow and Mount Rainier, Mount Rainier National Park, Washington

Tim Fitzharris / Myrtle Falls and Mount Rainier, Mount Rainier National Park, Washington

Doc White / Sockeye salmon (Oncorhynchus nerka), Pacific Northwest, USA.

Doc White / Sockeye salmon (Oncorhynchus nerka), Pacific Northwest, USA.

Yva Momatiuk & John Eastcott / Red apples in orchard before harvest, Washington

Yva Momatiuk & John Eastcott / Harvested and freshly ploughed wheat fields with winter wheat already growing, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Red apples on tree before harvest, Washington

Yva Momatiuk & John Eastcott / Harvested straw tied in bales, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Harvested straw tied in bales, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Harvested straw tied in bales under lofty cumulus clouds, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Harvested and freshly ploughed wheat fields with winter wheat already growing, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Harvested and freshly ploughed wheat fields, Palouse Hills, Washington

Yva Momatiuk & John Eastcott / Harvested wheat fields under lofty cumulus clouds with virga, Palouse Hills, Washington

Konrad Wothe / Devil's Club (Oplopanax horridus) flowering in temperate rainforest, Olympic National Park, Washington

Konrad Wothe / Golden-mantled Ground Squirrel (Callospermophilus lateralis) carrying grasses used for nest building in its mouth, Mount Rainier National Park, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca) on drift wood, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca) on drift wood, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca) male and female on drift wood, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca) flying, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca), Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca), Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca), Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca), Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca) calling, Washington

Donald M. Jones / Snowy Owl (Nyctea scandiaca), Washington

Donald M. Jones / Dunlin (Calidris alpina) flock in winter plumage flying along coast, Washington

Donald M. Jones / Dunlin (Calidris alpina) flock in winter plumage flying along coast, Washington

Michael Durham / The famous ancient rock art known as Tsagaglalal, located in the Columbia Hills State Park, Washington

Michael Durham / California Myotis (Myotis californicus) roosting at Moses Coulee Field Station, central Washington