A baby chimpanzee is held by its mother, Tibe, at the Barcelona Zoo in this August 31, 2007 file photo. Almost half the world's monkeys and apes are facing a worsening threat of extinction because of deforestation and hunting for meat, an international report showed on August 5, 2008. Chimpanzees, the species most like humans, stayed "endangered", the middle of a three-stage scale of risk between critically endangered and "vulnerable." [Agencies]