Stars over the Chisos Mountains, Big Bend National Park, Texas, USA.

Skach Koyl Horse Race on All Saints Day,Todos Santos Cuchumatán, Guatemala

Hill Country region, Texas, USA

Backlit man on Castle Rock with night sky and stars, Vermejo Park Ranch, New Mexico, USA.

Gnaoua musicians at night camp, Erg Chebbi, Saharan Desert, Morocco

Great egrets, Lemon Lake, Great Trinity Forest near Trinity River, Dallas, Texas, USA.

Black cats and blue wall, Chefchaouen, Morocco

Rainbow shaped fog known as a "fog bow" above meadow, Vermejo Park Ranch, New Mexico, USA.

Smoke and fire of prescribed burn with maximilian sunflowers on the Blackland Prairie at Clymer Meadow Preserve, Texas Nature Conservancy, Greenville, Texas, USA.

Local guide holding dead monarchs from February 2002 die-off, caused by freezes and habitat loss, Sierra Chincua Monarch Butterfly Sanctuary, Monarch Butterfly Biosphere Reserve, Michoacan, Mexico.

Mexican free-tailed bat (recently deceased) held by hand with wings spread, Vermejo Park Ranch, New Mexico, USA.

Granular poison frog (Oophaga granulifera) , Corcovado National Park, Osa Peninsula, Costa Rica

Black bear running and jumping over log, Vermejo Park Ranch, New Mexico, USA.

Grackles fighting against setting sun, Fennessey Ranch, near Corpus Christi , Texas USA.

Irish schoolchildren, County Galway, Ireland

Aerial view of bull elk (Cervus elaphus) with harem, running, Vermejo Park Ranch, New Mexico, USA. (aken by helicopter during aerial elk survey).

Palm pit viper (Bothriechis lateralis) near Monteverde Cloud Forest Preserve, Costa Rica. Captive.

Instructor and kids examining three-toed box turtle, Dogwood Canyon Audubon Center, Cedar Hill, Texas, USA.

Windmill with holiday lights on stock tank beneath night stars and Milky Way, Rita Blanca National Grasslands, Texas, USA.

Flooded farmhouse in Devil's Lake North Dakota. Lake has been slowly expanding and flooding surrounding land for over a decade.

Girl from summer camp examining spider and web in prairie, Dogwood Canyon Audubon Center, Cedar Hill, Texas, USA.

Trees and and shadows on pan and dunes, Namib-Naukluft National Park,

Autumn leaf on rock in Guadalupe River, James Kiehl River Bend Park, Comfort, Texas USA

Killdeer (Charadrius vociferus) on nest in Hill Country region, Texas, USA.

Sandhill cranes at sunset (Grus canadensis) at Bosque del Apache National Wildlife Refuge, New Mexico, USA

Reflection and ripples in Trinity River near Trinity River Audubon Center, Dallas, Texas, USA.

Abandoned house in water at night, with stars and Milky Way, Day County, South Dakota, USA.

Smoke and fire from prescribed burn backlighting trees on the Blackland Prairie at Clymer Meadow Preserve, Texas Nature Conservancy, Greenville, Texas, USA.

Burned dictionary in glass and rubble, Salton Sea Beach, California

Great Egret (Ardea alba) striking at fish, La Ramireña Ranch, Texas, USA

Foxglove penstemon wildflowers on McCommas Bluff above Trinity River, Great Trinity Forest, Dallas, Texas, USA

El Rosario, Monarch Butterfly Biosphere Reserve, Mexico

Great egrets, wood storks, and roseate spoonbills on pond in Great Trinity Forest, Dallas, Texas, USA

View of two female black-chinned hummingbirds (Archilochus alexandri) from directly beneath, framed against blue sky and clouds, Petersen Ranch, Texas, USA

Western coachwhip snake in den, South Texas, USA

Bison crossing snowfield, Yellowstone National Park, Wyoming, USA

Prairie Flowers Abstract, Ordway Prairie, The Nature Conservancy, South Dakotagg

Coyote pups at play with stick, Vermejo Park Ranch, New Mexico, USA.

Boy and fishing boats, Essaouira, Morocco.

Man chasing boy past "Life is Beautiful" graffiti tag, Philadelphia, USA.