Deciduous forests occur in areas of moderate temperature and rainfall with cold winters. Species belonging to these forests drop leaves in autumn.The tropical monsoon deciduous forests are found in areas receiving annual rainfall of 100 to 200 cms in India, with a distinct dry and rainy seasons and a small range of temperature. They occur on the wetter western side of the Deccan Plateau, the north-eastern part of the Deccan Plateau and the lower slopes of the Himalayas, on the Siwalik Hills from Jammu in the west to West Bengal in the east. They cover parts of Chhattisgarh, Orissa, Bihar, Jharkand, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu. The principal trees of these forests are teak, sal, sandalwood, mahua and khair.