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

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

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

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

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

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

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

Irish schoolchildren, County Galway, Ireland

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

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

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

Black cats and blue wall, Chefchaouen, Morocco

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.

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

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.

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

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

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

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

Western coachwhip snake in den, South Texas, USA

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

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

Boy and fishing boats, Essaouira, Morocco.

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

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

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

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

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

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

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

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

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

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

Hill Country region, Texas, USA

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

El Rosario, Monarch Butterfly Biosphere Reserve, Mexico

Bison crossing snowfield, Yellowstone National Park, Wyoming, USA