Wildlife conservation and research activities take place at Arignar Anna Zoological Park including olive ridley sea turtle conservation.[99] Madras Crocodile Bank Trust is a herpetology research station, located 40 kilometres (25 mi) south of Chennai.[100] The city's tree cover is estimated to be around 64.06 sq km.[101] The most dominant tree species is the copper pod, followed by Indian beech and Neem.