Olive ridleys get their name from the coloring of their heart-shaped
shell, which starts out gray but becomes olive green once the turtles
are adults. They have one to two visible claws on each of their
paddle-like flippers.
The olive ridley turtle is named for the generally greenish color
of its skin and shell, or carapace. It is closely related to the Kemp’s
ridley, with the primary distinction being that olive ridleys are found
only in warmer waters, including the southern Atlantic, Pacific and
Indian Oceans.
Olive and Kemp’s ridleys are the smallest of the
sea turtles, weighing up to 100 pounds (45 kilograms) and reaching only
about 2 feet (65 centimeters) in shell length. The olive ridley has a
slightly smaller head and smaller shell than the Kemp’s.
These
turtles are solitary, preferring the open ocean. They migrate hundreds
or even thousands of miles every year, and come together as a group only
once a year for the arribada,
when females return to the beaches where they hatched and lumber onshore, sometimes in the thousands, to nest.
Olive
ridleys have nesting sites all over the world, on tropical and
subtropical beaches. During nesting, they use the wind and the tide to
help them reach the beach. Females lay about a hundred eggs, but may
nest up to three times a year. The nesting season is from June to
December.
The olive ridley is mostly carnivorous, feeding on such
creatures as jellyfish, snails, crabs, and shrimp. They will
occasionally eat algae and seaweed as well. Hatchlings, most of which
perish before reaching the ocean, are preyed on by crabs, raccoons,
pigs, snakes, and birds, among others. Adults are often taken by sharks.
Though
the olive ridley is widely considered the most abundant of the marine
turtles, by all estimates, it is in trouble. Rough estimates put the
worldwide population of nesting females at about 800,000, but its
numbers, particularly in the western Atlantic, have declined
precipitously. The United States lists the western Atlantic population
of olive ridleys as endangered and all other populations as threatened.
Many
governments have protections for olive ridleys, but still, eggs are
taken and nesting females are slaughtered for their meat and skin.
Fishing nets also take a large toll, frequently snagging and drowning
these turtles.
Fast Facts
- Type:
- Reptile
- Diet:
- Omnivore
- Average life span in the wild:
- 50 years
- Size:
- 2 to 2.5 ft (62 to 70 cm)
- Weight:
- Up to 100 lbs (45 kg)
- Protection status:
- Endangered
- Did you know?
- Male olive ridleys can be distinguished from females by their tails, which stick out beyond their carapace
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