The Whistling Kite is found in woodlands, open country and particularly wetlands. They soar above the river, trees and land to search for prey such as carrion (dead animals) and small live animals such as mammals, birds, fish and insects.
The Whistling Kite appears to be monogamous, with some breeding pairs remaining in a territory throughout the year and pairs actively defend the area around a nest. The bulky nest platform is built of sticks in a tall tree and may be reused, growing larger over time. Both sexes build the nest and incubate the eggs (the female does most of the incubation however) and may breed two or three times a year. The young stay with the parents after fledging for about six to eight weeks.