Where are new animal species discovered?

Scientists often come across new species of animals in areas that are difficult to access for humans, such as mountain peaks, caves, deserts, rain forests, and the depths of the oceans. In the tropical rain forest itself, new species of insects and spiders, and also other animal species, are being discovered regularly. To explore the tops of giant trees, biologists use mountaineering equipment keep in a tree house on the top of the trees.