There are over 3,000 plant species, including hundreds of varieties of trees, shrubs, vines, flowers, and fungi. The country is particularly rich in such medicinal plants as rue, wormwood, and asafetida; fruit and nut trees are found in many areas. Native fauna include the fox, lynx, wild dog, bear, mongoose, shrew, hedgehog, hyena, jerboa, hare, and wild varieties of cats, asses, mountain goats, and mountain sheep. Trout is the most common fish. There are more than 100 species of wildfowl and birds.