01:04 United Kingdom West African Roloway monkeys, one of the most endangered species arrive UK Zoo "In the last few decades alone, Roloway monkeys have experienced a devastating crash in numbers, losing around 90% of its population," said Mike ...
01:25 Environment World wildlife plummets more than two-thirds in 50 years Between 1970 and 2016, global populations of vertebrates - birds, fish, mammals, amphibians and reptiles - declined by an average of 68%, reveals ...