Grassy box gum woodlands once covered millions of square kilometers in southeastern Australia, but today less than 5% remains. The loss of large old trees has been a crisis for the many species of birds and other animals that depend on them for habitat. Grassy box gum woodlands once covered millions of square kilometers in southeastern Australia, but today less than 5% remains. The loss of large old trees has been a crisis for the many species of birds and other animals that depend on them for habitat. Ecology Phys.org – latest science and technology news stories