Niassa is a huge 42,000 km square park and has the same ecosystem as the Selous Game Reserve across the border in Tanzania. The wildlife is here is good although it is not a place to tick off the big five because the animals are not so used to seeing vehicles and can be fairly skittish. You can find some of the parks 200 wild dog, elephant, wildebeest, kudu, thousands of buffalo, lion, leopard and spotted hyena if you are lucky. It is not a place to go to tick off animals from a list though, but is for those travellers who seek unspoilt vast wilderness and a wholly uncommercial safari experience.