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

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

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

Western coachwhip snake in den, South Texas, USA

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

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

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

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

Black cats and blue wall, Chefchaouen, Morocco

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

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

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

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

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

Irish schoolchildren, County Galway, Ireland

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

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

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

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

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

El Rosario, Monarch Butterfly Biosphere Reserve, Mexico

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.

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

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

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

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

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

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

Boy and fishing boats, Essaouira, Morocco.

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

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

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

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

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

Hill Country region, Texas, USA

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

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

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.

Bison crossing snowfield, Yellowstone National Park, Wyoming, USA