Dave Watts / Eastern grey kangaroo (Macropus giganteus) with joey in pouch, Australian Capital Territory, Australia, September

Juergen & Christine Sohns / Eastern Grey Kangaroo (Macropus giganteus) mother with joey, Maloney Beach, New South Wales, Australia

Juergen & Christine Sohns / Eastern Grey Kangaroo (Macropus giganteus) male jumping, Maloney Beach, New South Wales, Australia

Juergen & Christine Sohns / Eastern Grey Kangaroo (Macropus giganteus) mother with joey jumping, Maloney Beach, New South Wales, Australia

Juergen & Christine Sohns / Eastern Grey Kangaroo (Macropus giganteus) group jumping, Maloney Beach, New South Wales, Australia

Ingo Arndt / Eastern grey kangaroo {Macropus giganteus} juvenile, Australia

Ingo Arndt / Eastern grey kangaroo with joey suckling (Macropus giganteus) Australia

Ingo Arndt / Eastern grey kangaroos sparring {Macropus giganteus} Australia

Ingo Arndt / Eastern grey kangaroo joey looking out of pouch, Wilsons Promontory NP Australia

Ingo Arndt / Eastern grey kangaroo female with joey peering out of pouch {Macropus giganteus}. Wilson Promontory NP Australia

Roland Seitre / Eastern grey kangaroo (Macropus giganteus) herd, Yuraygir National Park, Grafton, New South Wales, Australia.

D. Parer & E. Parer-Cook / Eastern Grey Kangaroo (Macropus giganteus) portrait, Maria Island National Park, Tasmania, Australia