Red kangaroos are herbivores and eat mainly green herbage (grass and leaves). Red kangaroos can go some time with out much water. They hydrate from the plants that they eat. During the hot times of the year, they can go through a week receiving water only twice. Dingos foxes and wedge-tail eagles all rely on red kangaroos for food. Humans also have an impact.

Foxes hunt kangaroos

In good times young red kangaroos can become independent in about 240 days. Other times when its not so great it takes around 600 days for the young to become fully independent. Once their population goes up, their predators population will start to increase as well.

Serve weather storms and wild fires affect red kangaroos. Theses natural elements can kill off needed plants for the kangaroos and flood the area. If the number of dingoes and foxes are too high in an area for the kangaroos to survive, they will decide to leave. There is competition between sheep and the kangaroos who live in the same type of habitat and have the same diet. These are density-dependent factors. All of these examples could cause the kangaroos to immigrate to another area.

For the kangaroos to emigrate into a different area, that area would need a stably amount of rainfall and plenty of vegetation. There would also have to be a lower number of sheep and predators, like foxes. The number of those populations would have to be stay stable for the red kangaroos to reach the areas carrying capacity.