The original swamp forests have almost entirely been removed as the plain has been converted to rice paddies, other agriculture, and urban areas like Bangkok. Much of the wildlife that once inhabited these plains has disappeared, including a large number of fish in the river systems, birds such as vultures, the Oriental darter ("Anhinga melanogaster"), white-eyed river martin ("Pseudochelidon sirintarae"), the sarus crane ("Grus antigone") and animals such as tigers, Asian elephants, Javan rhinoceroses, and the much-hunted Schomburgk's deer. Today we can only guess at the original habitat and wildlife by comparing it with neighbouring countries. It is believed that the area would have consisted of freshwater swamps inland and salty mangroves on the coast and the river estuaries. The swamp would have been covered in "Phragmites" marsh grasses. Today there is a small area of this remaining in Khao Sam Roi Yot National Park, a relic of the original landscape.