Outside the cultivated areas, numerous wild desert flowers appear, most noticeably after rain. Desert shrubs, grasses, and wild date palms are also found. Mammalian life is limited to the jerboa (desert rat), gazelle, mongoose, and hare; some 14 species of lizard and 4 types of land snake are also found. Bird life is especially varied. Larks, song thrushes, swallows, and terns are frequent visitors, and residents include the bulbul, hoopoe, parakeet, and warbler.