Jack Dykinga / Colorado River Delta, with watercourse sculpted patterns eroded into the salt / silt flats near the Sea of Cortez, La Reserva del Golfo, Baja, Mexico

Jack Dykinga / Aerial view of alluvial patterns in the Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Gabriel Rojo / Dusky dolphins {Lagenorhynchus obscurus} Golfo Nuevo, Argentina

Gabriel Rojo / Dusky dolphin leaping {Lagenorhynchus obscurus} Golfo Nuevo, Argentina

Gabriel Rojo / Southern right whale pectoral fin {Balaena glacialis australis} Patagonia, Argentina

Michael D. Kern / Poison dart frog (Phyllobates vittatus) captive, from Central America

Wild Wonders of Europe / Relanzón / Coast around El Golfo, Timanfaya National Park, Lanzarote, Canary Islands, Spain, March 2009

Wild Wonders of Europe / Relanzón / Coast around El Golfo, Timanfaya National Park, Lanzarote, Canary Islands, Spain, March 2009

Wild Wonders of Europe / Relanzón / Charco de los Clicos (Clikos puddle) with green water because of seaweed, El Golfo, Timanfaya National Park, Lanzarote, Canary Islands, Spain, March 2009

Sue Daly / Golfo dulcean poison dart frog (Phyllobates vittatus) portrait, captive

Sue Daly / Golfo dulcean poison dart frog (Phyllobates vittatus) on rock, captive

Jack Dykinga / Aerial view of the Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Jack Dykinga / Aerial view of alluvial patterns in the Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Jack Dykinga / Aerial view of alluvial patterns in the Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Jack Dykinga / Aerial view of the Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Jack Dykinga / Shell studded rocks in sand beneath cliffs of Sonora, El Golfo Biosphere Reserve, Mexico

Jack Dykinga / Fossil sand dollars found in sand beneath cliffs of Sonora, El Golfo Biosphere Reserve, Mexico

Philippe Clement / Territorial male Brown Anole / Golfo Dulce (Norops polylepis) displaying throat fan / dewlap, Carara NP, Costa rica

Philippe Clement / Brown Anole / Golfo Dulce (Norops polylepis) on leaf litter, Carara NP, Costa Rica

Jack Dykinga / Sun setting over sea, El Golfo Biosphere Reserve, Mexico

Jack Dykinga / Alluvial pattern in Upper Gulf and Colorado Delta Biosphere Preserve, El Golfo, Baja California, Mexico

Philippe Clement / Golfo Dulcean poison dart frogs {Phyllobates vittatus} on branch, Costa Rica.

Philippe Clement / Golfo Dulcean poison dart frogs {Phyllobates vittatus} on wet rock, Costa Rica.

Hanne & Jens Eriksen / New Zealand albatross {Diomedea antipodensis} in flight, Golfo de Penas, Chile

Gabriel Rojo / Gull feeds on wounds of Southern right whale {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale breaching {Balaena glacialis australis} Valdez Patagonia Argentina

Gabriel Rojo / Southern right whale diving {Balaena glacialis australis} Argentina Patagonia Argentina

Gabriel Rojo / Blow hole of Southern right whale underwater {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale penis visible during mating {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale diving {Balaena glacialis australis} Argentina Patagonia Argentina

Gabriel Rojo / Whale watchers view Southern right whale {Balaena glacialis australis} Patagonia Argentina

Gabriel Rojo / Southern right whale calf breaching {Balaena glacialis australis} Patagonia Argentina

Gabriel Rojo / Southern right whale callouses formed by Cyamids (amphipods) feeding on dead skin. Argentina

Gabriel Rojo / Southern right whale mother albino calf {Balaena glacialis australis} Patagonia Argentina

Gabriel Rojo / Southern right whale diving {Balaena glacialis australis} Argentina Patagonia Argentina

Gabriel Rojo / Southern right whale breaching {Balaena glacialis australis} Valdez Patagonia Argentina

Gabriel Rojo / Southern right whale diving {Balaena glacialis australis} Argentina Patagonia Argentina

Gabriel Rojo / Ulcer wounds on back of Southern right whale {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale pectoral fin {Balaena glacialis australis} Patagonia Argentina

Gabriel Rojo / Southern right whale albino calf spy hopping {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale tail fluke {Balaena glacialis australis} Argentina Patagonia Argentina

Gabriel Rojo / Southern right whale underwater {Balaena glacialis australis} Valdez Patagonia Argentina

Gabriel Rojo / Southern right whale breaching {Balaena glacialis australis} Valdez Patagonia Argentina

Gabriel Rojo / Gull feeds on wounds of Southern right whale {Balaena glacialis australis} Argentina

Gabriel Rojo / Southern right whale calf breaching {Balaena glacialis australis} Patagonia Argentina

Gabriel Rojo / Ulcer wounds on back of Southern right whale {Balaena glacialis australis} Argentina