qT=1&tQ=What is the greatest threat to today’s animal populations?&tC=Habitat loss.|Hunting and poaching.|Pollution.|Spontaneous combustion.&cC=1&fB=Humans have destroyed over half of the Earth’s forests, and the remaining forest habitats are shrinking fast. Since all creatures need space in which to live, find food, and reproduce, habitat loss is the biggest threat to wildlife today.<br><br>The larger the animal, the more likely it is to be effected by habitat loss, as creatures like tigers and gorillas need large areas of land to breed.  At least 120 of the 620 primate species will become extinct within 20 years if rates of habitat loss do not improve.