A newborn elephant calf tries to reach a branch offered by its mother Donna at the Prague Zoo. The unnamed female calf, born two weeks ago, is the first ever elephant born in captivity in the history of the zoo.—Photo by Reuters

Chabal, A "Rouge-des-Pres" five-year-old bull, the heaviest animal (1,790kg ) of the International Agriculture Fair of Paris, is seen at its stand, at the Porte de Versailles exhibition center, in Paris. Some 1,300 exhibitors and 4,000 animals attend the fair which runs from from February 23 to March 3, 2013. The name refers to French icon Sebastien Chabal, former French rugby nation team's number 8.—Photo by AFP

A Southern Ocean elephant seal wears a sensor on its head as it swims in the Southern Ocean, Antarctica. Elephant seals wearing head sensors and swimming deep beneath Antarctic ice have helped scientists better understand how the ocean's coldest, deepest waters are formed, providing vital clues to understanding its role in the world's climate. The tagged seals, along with sophisticated satellite data and moorings in ocean canyons, all played a role in providing data from the extreme Antarctic environment, where observations are very rare and ships could not go, said researchers at the Antarctic Climate & Ecosystem CRC in Tasmania. The sensor weighs about 100 to 200 grams and has a small satellite relay which transmits data on a daily basis.—Photo by Reuters

Two Southern Ocean elephant seals wearing sensors on their heads swim in the Southern Ocean, Antarctica. Elephant seals wearing head sensors and swimming deep beneath Antarctic ice have helped scientists better understand how the ocean's coldest, deepest waters are formed, providing vital clues to understanding its role in the world's climate. The tagged seals, along with sophisticated satellite data and moorings in ocean canyons, all played a role in providing data from the extreme Antarctic environment, where observations are very rare and ships could not go, said researchers at the Antarctic Climate & Ecosystem CRC in Tasmania. The sensor weighs about 100 to 200 grams and has a small satellite relay which transmits data on a daily basis.—Photo by Reuters

A California Sea Lion is shown jumping in this undated handout photo provided by Wildlife Conservation Society. The Wildlife Conservation Society plans to partially reopen the hurricane-damaged New York Aquarium including a new fully re-modeled Aquatheater with a new sea lion demonstration in late spring of this year.—Photo by Reuters

A Sumatran tiger growls at the Sumatra Tiger Rescue Centre compound, inside the Tambling Wildlife Nature Conservation (TWNC), near Bandar Lampung, the southern tip of Sumatra island. The rescue centre has released five tigers since 2009 on the 45,000 hectares of the TWNC jungle while eight are still under their care. One of the eight will be released next year. Rizal, a tiger keeper, said on a monthly basis the eight tigers eat a total of 80 live pigs, each weighing between 10-12 kilograms. The Sumatran tiger is a rare tiger subspecies that inhabits the Indonesian island of Sumatra. About 440-600 Sumatran tigers, which was classified as critically endangered, were accounted for by the International Union for Conservation of Nature (IUCN) in 2008. The owner of TWNC, Tomy Winata, said his company, Artha Graha, has already invested between $20-25 million in TWNC, with monthly costs to sustain the reserve at approximately $150,000.—Photo by Reuters

Dzhen, a one and a half year-old Bengali white female tiger growls as she walks inside an open-air cage at the Royev Ruchey zoo in a surburb of Russia's Siberian city of Krasnoyarsk. Dzhen was born in a zoo in South Africa and was introduced as a breeding partner for a 3-year-old male white tiger named Khan, according to an official representative of the zoo.—Photo by Reuters

Two lions are seen in their enclosure on a private property in Bucharest. The animal rights foundation "Vier Pfoten" transferred two bears and four lions belonging to an arrested moneylender to a state-owned zoo, Romanian state authorities said. Romanian law prohibits the possession of wild animals by individuals.—Photo by Reuters

A cat watches passers-by from a pub window in central London. 'Ray Brown' is the resident cat at the seventeenth century public house, 'The Seven Stars' in the legal district of London.—Photo by Reuters

In this photo provided by the Chicago Zoological Society, Max, a 2-year-old Amur tiger, plays with what is left of a snowman that his keepers made for him, at the Brookfield Zoo in Brookfield, Ill. Before being knocked down, the snowman featured meat for eyes and buttons, as well as bones for feet. The Chicago Zoological Society’s Animal Programs staff provides enrichment to the animals that encourages natural behavior by physically and mentally stimulating them with a variety of items that they may not receive on a regular basis.—Photo by AP