A baby koala hangs onto it's mother's back during feeding time at Sydney's Taronga Zoo in this June 25, 2001 file photo. An overcrowded colony of about 1,000 koalas in Australia is being assessed this... more 
A baby koala hangs onto it's mother's back during feeding time at Sydney's Taronga Zoo in this June 25, 2001 file photo. An overcrowded colony of about 1,000 koalas in Australia is being assessed this week for possible ill health in a survey that could lead to a cull, raising objections from animal welfare lobbyists. The Victorian state government is concerned many of the koalas may be undernourished because the colony at Cape Otway has grown even as the supply of the koalas' staple diet of manna gum leaves has diminished. Koalas are a protected species in Australia, where they serve as a major tourist attraction and fulfil the odd diplomatic role - world leaders including U.S. President Barack Obama were pictured cuddling the docile animals at a G20 summit in Brisbane last year. REUTERS/David Gray/Files less 
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Reuters | Photo By DAVID GRAY / REUTERS
Wed, May 27, 2015 3:30 AM EDT