At least 25% of all mammals on Earth are at risk of extinction due to human impact. The largest threat to animals is loss of habitat (for example deforestation). Not only are 25% of mammals at risk of extinction, 40% of mammals have to adapt due to human expansion destroying their habitat. The second biggest threat on land is identified as hunting, for food or medicines. In the seas, bycatch – entanglement in fishing nets, which is usually although not always accidental – emerges as the biggest factor behind current declines, affecting a staggering 79% of marine mammals.
According to BBC, in 2008, out of the 5,487 mammals studied by the Red List 1,141 are currently on the path towards extinction.