By Tim Hirsch
BBC Environment correspondent
Villagers in Uganda are living in fear of rogue chimpanzees which have been attacking human babies.
Chimpanzees do not normally attack humans
A report in next month's BBC Wildlife magazine links the attacks to a fast growing human population cutting down forests, forcing chimps onto farmland.
Until recently, attacks on people by chimpanzees were extremely rare.
But in western Uganda, at least 15 young children have been badly injured by aggressive males in the past seven years - around half were killed.
In one case a baby was snatched from his mother's back.
The attacks are an extreme example of the conflicts between people and wildlife which are a major problem for wildlife authorities as they try to conserve the dwindling number of great apes in the wild.