Male kangaroos, also known as boomers, are the largest of the four species of kangaroo. They are found in Australia and New Guinea and can reach up to two meters in height and weigh up to 90 kilograms. Boomers are solitary animals and are mainly active at night. They feed on grasses, leaves, and other vegetation. They are also known for their powerful hind legs and long tails which they use for balance when hopping.