How long do male red kangaroos live?

In the wild anything from 7 to 15 years

There are over 60 species of kangaroos, and their life span varies according to their species. The larger species live the longest, and their average life expectancy in the wild, for both males and females, can be anywhere between 10 - 15 years. Smaller species, such as the rat-kangaroos, may only live for 4-6 years.