Yala National Park is a terrain of varying flat plains alternating with rocky outcrops. Its vegetation ranges from open parklands to dense jungles dotted with small lakes, lagoons and flowing steams, which pump its ecosystem with an abundant supply of water even in the driest season. Its ecosystem varies from moist monsoon forests to sandy beaches. Yala is world renowned for its array of wildlife; with over 215 bird species and 44 species of mammals, the highlight of Yala is the high density of leopards. Its said to be the highest density found in any part of the world, which is about 0.4 per every km2 in Block 1(140 km2).