Animal Tracks: A fierce lion cub and 15 of this week's best animal photos

Ri Ri, a male giant panda, prepares to eat a birthday cake in his enclosure at the Ueno zoo in Tokyo, Aug. 16.

A striated heron catching a fish in the city of Guri, South Korea, on Aug. 15.

Pine Tyme, a subadult loggerhead sea turtle fitted with a satellite tracking transmitter, crawls into the Atlantic Ocean after being released in Marathon, Florida, on Aug. 15. The 80-pound female turtle was rehabilitated at the Keys-based Turtle Hospital, and is the 11th turtle being tracked online during the Tour de Turtles, a three-month-long event organized by the Sea Turtle Conservancy.

A 13-week old white lion cub tries a roar at the zoo in La Fleche, France, on Aug. 15.

Two storks sit on their nest in Wahrenholz, northwestern Germany, on Aug. 14.

A turtle sits on a rock at Stow Lake in San Francisco, on Aug. 11. San Francisco Bay Area animal shelters and humane society leaders are reminding the public of the level of commitment it takes to own a turtle as they brace for a surge in sales of turtles following the box office success of the new Teenage Mutant Ninja Turtles movie.

Three brown bears cubs are pictured after they were transported to a wildlife enclosure in Kosovo, on Aug. 11.

Two unnamed female Sri Lankan baby leopards are seen in a zoo in Maubeuge, France, on Aug. 12.

A cat stands up on a post near a corn field in Laredo, northern Spain, on Aug. 15.

A bird flies over the crater of mount Bromo thrown by Hindu worshippers during the Yadnya Kasada Festival in Probolinggo, East Java, Indonesia, on Aug. 12.

Birds sit on the Santa Monica Pier roller coaster track during the full or perigee moon, also known as a "supermoon,' in Santa Monica, Calif., on Aug. 11.

A dog catches a Frisbee as it takes part in the qualifying competitions of the 'Disc Dog' European and World Championships in Vitoria, Spain, on Aug. 16.

A heron after catching a fish in Guri, South Korea, on Aug. 15.

Aisha the dog follows her owner as he jumps into a lake at sunset in Bucharest, Romania, on Aug. 12.

CJ, Austin and Summer stroll around the Southaven Arena prior to their turn in the ring at the Memphis Toy Dog Show in Southaven, Miss., on Aug. 15.

A wild bullfrog floats in a cattle watering trough on a ranch near Elkton, Ore., on Aug. 16.