Animal Tracks: Sept. 11 - Sept. 18

A beluga paints a picture at the Yokohama Hakkeijima Sea Paradise aquarium in Tokyo on Sept. 17.

Israeli marine biologist Yaniv Levy swims near one tiny loggerhead turtle after it hatched on Sept. 15 at a turtle rescue center in Netanya, Israel.

A bullfrog clings to a blackberry vine as it floats in a cattle watering trough on a ranch near Roseburg, Ore., on Sept. 15.

A snail crawls on a wet floor after an overnight rain in the Chiang Mai province of northern Thailand on Sept. 16.

Challenger, a bald eagle, flies over Lincoln Financial Field before the start of a game between the San Diego Chargers and the Philadelphia Eagles on Sept. 15 in Philadelphia, Penn.

Zebras run in the water in Kenya's Nairobi National Park on Sept. 15.

Puff adders mate in Nairobi National Park on Sept. 15. The puff adder is one of the deadliest snakes in Africa.

A dog wears a cheesehead outside Lambeau Field before an NFL football game between the Green Bay Packers and the Washington Redskins on Sept. 15 in Green Bay, Wis.

Children are silhouetted as they watch polar bear Inuka swim in his ice tundra on Sept. 15 at the Singapore Zoo.

A sphynx cat sits while the jury meets during the second day of the International Cat Exhibition in Sofia, Bulgaria, on Sept. 15.

A panda cub sits in a bowl at the Taipei City Zoo on Sept. 15. The cub, the first panda born in Taiwan, was delivered on July 7 following a series of artificial insemination sessions. Her parents, Yuan Yuan and Tuan Tuan, failed to conceive naturally.

A dog walks around the field during Bark in the Park day at Citi Field before the first game of a doubleheader baseball game between the New York Mets and the Miami Marlins on Sept. 14.

A newborn short-tailed monkey clings to its mother Katara at the zoo in Hanover, Germany, on Sept. 13. The baby was born on Sept. 4.

Dwarf mongooses huddle together at the Zoologischer Garten in Berlin on Sept. 13. Dwarf mongooses are endemic to Africa.

A stray dog is seen next to a Romanian musician who plays the tambal, an instrument based on the Persian santur, at Monastiraki Square in Athens on Sept. 13.

An ocelot cub is seen at the predator house of the Berlin Zoological Garden in Germany on Sept. 13. The young feline was born on July 16.

Mona, a 15-year-old white antelope (also called an addax), nuzzles up to her unnamed calf at the Brookfield Zoo in Brookfield, Ill., on Sept. 11. The calf, born Sept. 4, is the fourth male addax born at the zoo this summer.

Sea lions fight with each other on Pier 39 at Fisherman's Wharf on Sept. 11 in San Francisco. The sea lions have become a favorite attraction for tourists who visit the area.

A Tasmanian devil is seen at the Sydney Zoo on Sept. 11. It is part of the Dangerous and Deadly exhibit.

Granddad, the oldest fish in any zoo or aquarium in the world, swims in his tank in this photo released on Sept. 17. Although the Australian lungfish has resided at the aquarium for 80 years, Granddad’s exact age is still unknown as he was already fully grown upon arriving at the aquarium.