
By MARTIN ROBINSON Time for bed: Rigo sleeping at Melbourne Zoo after a roll in the hay with four females It is a tough, and clearly tiring job, but somebody has got to do it.Sleepy Rigo has just mated with four females in one day and takes on a very human pose afterwards to grab a well-earned snooze. After 16 years on his own in a cage the 41-year-old silverback is being allowed to hang around with other primates at Melbourne Zoo in Australia. Gentle: Julia sits with body-language just like a human as she stretches her legs in the midday sun Keepers hope he will continue to get to know the females there better and produce offspring as they are all part of the endangered Western Lowland species.And he has a bevy of beauties to choose from, including Julia, Yakini and Yuska, who despite their...