Approximately 289,000 square miles of the Amazon Basin has been deforested since the late 1970s. Approximately 60% is from ranching. The resulting pastures tend to be of poor quality, yet cleared land is easier for claiming ownership. These livestock are mixed breeds. The white animal with drooping ears is an Indo-Brazilian. When they were imported to the United States in 1946, they became the brahman. The others are nagori cattle. Both species are very tolerant of extreme heat.