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

Jurgen Freund / Margit Cianelli with Lumholtz tree kangaroo (Dendrolagus lumholtzi) 'Kimberley', a kangaroo she raised from a baby, now living in nearby forest with her own joey. Lumholtz Lodge, Atherton Tabl...

Dave Watts / Female Western grey kangaroo (Macropus fuliginosus) rolling with a large joey in her pouch, Kangaroo Island, South Australia.

Dave Watts / Female Tamar wallaby (Macropus eugenii) grazing with a joey in her pouch, Kangaroo Island, South Australia.

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother with joey aged eight months, Queensland, Australia, captive.

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother and joey aged sixth months, Queensland, Australia, captive.

Dave Watts / Eastern grey kangaroo (Macropus giganteus) family group, male, female and large joey, Tasmania, Australia, February

Staffan Widstrand / Eastern grey kangaroo {Macropus giganteus} grazing with joey in pouch, Wilsons Promontory NP, Australia

Ingo Arndt / Eastern grey kangaroo with joey suckling (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

Staffan Widstrand / Eastern grey kangaroo with joey in pouch {Macropus giganteus} Wilsons promontory NP, Australia

Ingo Arndt / Eastern Grey Kangaroo (Macropus giganteus) joey reaching into mother's pouch, Wilson's Promontory National Park, Australia

Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) joey peeking out from its mother's pouch, Australia

Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) mother with joey, Australia

Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) joey peeking out of its mother's pouch, Australia

Juergen & Christine Sohns / Swamp Wallaby (Wallabia bicolor) mother and joey, Mount Lofty, South Australia, Australia

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) mother with joey jumping, Maloney Beach, New South Wales, Australia

Suzi Eszterhas / Common Wombat (Vombatus ursinus) seven month old orphaned joey at feeding time, Bonorong Wildlife Sanctuary, Tasmania, Australia

Suzi Eszterhas / Common Wombat (Vombatus ursinus) foster mother, Linda Tabone, bottle feeding six month old orphaned joey, Bonorong Wildlife Sanctuary, Tasmania, Australia

Suzi Eszterhas / Common Wombat (Vombatus ursinus) five month old orphaned joey with pacifier in mouth, Bonorong Wildlife Sanctuary, Tasmania, Australia

Martin Willis / Monjon (Petrogale burbidgei) mother with joey, Mitchell Plateau, Kimberley, Western Australia, Australia

Martin Willis / Monjon (Petrogale burbidgei) mother with joey, Mitchell Plateau, Kimberley, Western Australia, Australia

Martin Willis / Allied Rock Wallaby (Petrogale assimilis) mother with joey, Magnetic Island, Queensland, Australia

D. Parer & E. Parer-Cook / Tasmanian Devil (Sarcophilus harrisii) nine month old joey, Central Highlands, Tasmania, Australia

Roland Seitre / Eastern Grey Kangaroo (Macropus giganteus) joey in mother's pouch, New South Wales, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother mother cuddling her seven-month-old joey, Queensland, Australia

Suzi Eszterhas / Koala (Phascolarctos cinereus) mother cuddling her seven-month-old joey, Queensland, Australia

D. Parer & E. Parer-Cook / Eastern Grey Kangaroo (Macropus giganteus) female cleaning joey in pouch, Maria Island National Park, Australia

Hiroya Minakuchi / Red Kangaroo (Macropus rufus) mother grazing with joey in pouch, Australia

Gerry Ellis / Koala (Phascolarctos cinereus) mother with joey, eastern temperate Australia

Gerry Ellis / Koala (Phascolarctos cinereus) mother and three month old joey in tree, Australia

Gerry Ellis / Koala (Phascolarctos cinereus) mother and joey, three month old, Australia

Gerry Ellis / Koala (Phascolarctos cinereus) mother and joey, three month old, Australia

Fred Bavendam / Eastern Grey Kangaroo (Macropus giganteus) mother with joey peering out of pouch, Tidbinbilla National Park, Australia

Norbert Wu / Eastern Grey Kangaroo (Macropus giganteus) mother with joey, found in cow pastures and deserts, Australia

Mitsuaki Iwago / Koala (Phascolarctos cinereus) mother with young clinging to back, Australia

Mitsuaki Iwago / Koala (Phascolarctos cinereus) mother and young in tree, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) joey inside mother's pouch, 130 days old, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) newborn joey feeds while inside mother's pouch, 30 days old, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) male and female with joey in pouch, Sturt National Park, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) joey inside mother's pouch, 130 days old, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) mother embracing joey, Sturt National Park, New South Wales, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) mother grazing with joey in pouch, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) mother hopping with young in pouch, Australia

Mitsuaki Iwago / Red Kangaroo (Macropus rufus) juvenile scratching its nose, Australia

Shin Yoshino / Koala (Phascolarctos cinereus) mothers and babies in tree, Australia