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A 1,500 pound, 16 foot saltwater crocodile called Rex eagerly devoured a sizable portion of beef ribs on Wednesday, his first feed after emerging from three months of hibernation at the WILD LIFE Sydney Zoo in Sydney, Australia.  

In the winter, it is common for crocodiles to enter a period of inactivity where they survive on the existing energy stores inside their body, but once the weather starts warming up, so does their appetite.

-- Agence France Presse, Getty Images

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Swedish brown bear Fred is pictured at their enclosure of the Naturund Umweltpark Guestrow animal park on Jan. 27 in Guestrow, northeastern Germany. The bear just woke up from his hibernation, two weeks earlier than the year before.

Bernd Wüstneck / EPA

Swedish brown bears Fred and Frode play in their compound at the Nature and Environment Park Guestow, Germany, on Jan. 27. The eight-year-old brothers have already finished their winter sleep: about two weeks earlier that in the previous year.

See more images of cute animals on Animal Tracks.