Giraffes at Singapore Zoo

A giraffe uses its tongue to receive a carrot from zoo keeper Ram Wednesday, June 25, 2008 at the Singapore Zoo which recently started its giraffe feeding sessions as part of efforts to educate visitors about the wildlife and its relationship with the depleting natural resources available. (AP Photo/Wong Maye-E)

A visitor feeds a giraffe Wednesday, June 25, 2008 at the Singapore Zoo which recently started its giraffe feeding sessions as part of efforts to educate its visitors about the wildlife and its relationship with the depleting natural resources available. (AP Photo/Wong Maye-E)

Giraffes look into the camera as they wait to be fed by visitors Wednesday, June 25, 2008 at the Singapore Zoo which recently started its giraffe feeding sessions as part of efforts to educate its visitors about the wildlife and its relationship with the depleting natural resources available. (AP Photo/Wong Maye-E)