Benin has fields lying fallow, mangroves, and remnants of large sacred forests. In the rest of the country, the savanna is covered with thorny scrubs and dotted with huge baobab trees. Some forests line the banks of rivers. In the north and the northwest of Benin the Reserve du W du Niger and Pendjari National Park attract tourists eager to see elephants, lions, antelopes, hippos and monkeys. Previously Benin offered habitat for the endangered painted hunting dog, "Lycaon pictus", although this canid is considered to have been extirpated from Benin, due to human population expansion. Woodlands comprise approximately 31 percent of the land area of Benin.