Solvin Zankl / Mature female Olive ridley sea turtles (Lepidochelys olivacea) arriving on the beach of Ostional, Costa Rica, Pacific coast, during an arribada / mass nesting event, November

Solvin Zankl / The arrival of many Olive ridley sea turtles (Lepidochelys olivacea) at the beach of Ostional, Costa Rica, Pacific coast, at the beginning of an arribada (mass nesting event) November ^^^ Thousands an...

Solvin Zankl / Female Olive ridley sea turtle (Lepidochelys olivacea) swimming from the open ocean towards the beach of Ostional, Costa Rica, Pacific Ocean to lay its eggs in the warm sand, November

Solvin Zankl / As soon as it entered the water the young Olive ridley sea turtle (Lepidochelys olivacea) struggles against the swell to swim away from the coast. The swimming frenzy lasts for approximately 48 hours...

Solvin Zankl / These hatchlings of an Olive ridley sea turtle (Lepidochelys olivacea) should be buried and protected under 40 cm of warm sand, but a domestic dog dug them out at Ostional beach in Costa Rica. Novembe...

Solvin Zankl / After an incubation period of 45 to 55 days and several days long ascent through the sand the hatchling Olive ridley turtles (Lepidochelys olivacea) emerge all together. Ostional Beach, Costa Rica, No...

Doug Wechsler / Biologist releases Olive Ridley turtle hatchlings from study nest, Santa Rosa NP Costa Rica

Doug Perrine / Female Olive Ridley turtles coming ashore to lay eggs {Lepidochelys olivacea} Costa Rica, Pacific Ocean (Non-ex).

Doug Perrine / Female Olive Ridley turtles coming ashore to lay eggs at sunset {Lepidochelys olivacea} Costa Rica, Pacific Ocean (Non-ex).

Ben Osborne / Olive ridley turtle emerging from sea at dusk. Costa Rica {Lepidochelys olivacea}

Ben Osborne / Olive ridley turtle returns to sea at dawn. Costa Rica {Lepidochelys olivacea}

TIM MARTIN / Olive Ridley turtle hatchlings on beach in Costa Rica