Despite a fragile ecosystem, there is an abundance of birdlife. The region is a haven for migratory and resident birds of the desert. Many eagles, harriers, falcons, buzzards, kestrel and vultures are spotted here. Short-toed eagles, tawny eagles, spotted eagles, laggar falcons and kestrels are the most common among these. Sand grouse are spotted near small ponds or lakes. The endangered great Indian bustard is a magnificent bird found in relatively fair numbers. It migrates locally in different seasons. The most suitable time to visit the area is between November and January. The Desert National Park has a collection of fossils of animals and plants which is 180 million years old. Some fossils of dinosaurs which are 60 million years old have been found in the area.