Aerial view of Paraguay River near Corumba in the Pantanal during flood season. Brazil

Aerial view of the Pantanal in the region of the town of Corumba during the flood season. Brazil

Pantanal rancher relaxing on his veranda while cowboy drinks guarana; Pocone, Mato Grosso. Brazil

Three cowboys standing in archways of bunkhouse; early morning, Pantanal. Exhibit:'Arch Rivals'* Brazil

Cowboys pulling on chaps in the morning before hitting the trail on Pantanal ranch. Brazil

A Pantanal cowboy cuddles his new daughter while standing on the veranda of his ranch house. Brazil

Portrait of two little boys who are sons of Pantanal cowboys. Brazil

Pantanal cowboys drinking cold mate tea, terere, from cow horn of swamp water w/ silver straw. Brazil

Team of cowboys riding home after a long day, silhouetted by orange sunset in the Pantanal. Brazil

Cowboy riding atop bucking Nelore steer for sport. Brazil

Cowboy swinging lasso over his head while working cattle in the Pantanal. Brazil

Cowboy poling dugout canoe across quiet backwaters of a Pantanal ranch;setting sun in background. Brazil

Family peering out of the windows of their home-on-stilts in Pantanal floodwaters; March. Brazil

Last survivor of Pantanal tribe, the Guatos, Joao Querinho, 90+ years old;exhibit, 'Driftwood' * Brazil

Fisherman's wife walks outside thatch-roofed, mud home in the Pantanal; note pet Jabiru stork. Brazil

Fisherman posing before dilapidated home with poverty-plagued family. 'Fisherman's Legacy' Brazil

Little girl and father in front of their thatch house in the Pantanal. Brazil

Three baby capybaras tiptoeing along the top of a log in the Pantanal. Brazil

Jabiru Storks standing in nest with setting sun in back, horizontal; Pantanal. Brazil

White-necked heron perches on rock, silhouetted by river water all around; Pantanal. Brazil

Baby caimans hatch from numbered research eggs, part of gov't breeding program in the Pantanal Brazil

Like alien emerging from UFO, baby caiman peers from egg; gov't breeding program in the Pantanal Brazil

Close-up of baby caiman in grass near nursery pond where it will be raised for breeding program. Brazil

Submerged yacare caiman casts predatory eye across Pantanal pond; main food is snails & fish Brazil

Yacare caimans swim in bloody water after being thrown cattle scraps by cowboys in Pantanal. Brazil

Yacare caimans crowd up for free meal after cow is slaughtered on remote ranch in the Pantanal. Brazil

Yacare caimans crowd up for free meal after cow is slaughtered on remote ranch in the Pantanal. Brazil

Yacare caimans pause after bloody meal of cow scraps before returning to Pantanal lagoon. Brazil

Wild yacare caiman eats head of calf fetus from butchered cow it scavenged on Pantanal ranch. Brazil

Head-on portrait of yacare caiman; 1-2 million are poached yearly for their valuable skin;Pantanal Brazil

Wild caimans emerging from pond, attracted by butchered cow on a Pantanal ranch, side view. Brazil

State game agent examines pile of contraband yacare caiman skins seized from poachers in Pantanal Brazil

Former state game agency chief, Asturio Ferreira dos Santos, w/ contraband caiman skins;Pantanal Brazil

Military police and state game agents use motorboats to search for caiman poachers in Pantanal. Brazil

Game agents and military police w/ boat in plant-choked marsh during poaching raid in Pantanal Brazil

Detail of guns and ammo on waists of military police during raid on caiman poachers in Pantanal. Brazil

Military police and game agents slosh through swamp in search of caiman poachers in Pantanal. Brazil

Military police and game agents slosh through swamp in search of caiman poachers in Pantanal. Brazil

State game agents slosh through swamp in search of caiman poachers during raid in Pantanal Brazil

Military police officer points toward suspicious area during raid on caiman poachers;Pantanal Brazil