Dave Watts / Juvenile Australian sea lion (Neophoca cinerea) suckling on a beach, Seal Bay Conservation Area, Kangaroo Island, South Australia.

Dave Watts / Juvenile Australian sea lion (Neophoca cinerea) resting on a beach, Seal Bay Conservation Area, Kangaroo Island, South Australia.

Dave Watts / Juvenile Rosenberg's monitor (Varanus rosenbergi) emerging from a termite mound, Kangaroo Island, South Australia.

Dave Watts / Juvenile Rosenberg's monitor (Varanus rosenbergi) emerging from a termite mound, Kangaroo Island, South Australia.

Dave Watts / Australian pelican (Pelecanus conspicillatus) preening and resting on rocks, Kangaroo Island, South Australia.

Dave Watts / Pair of Cape barren geese (Cereopsis novaehollandiae) drinking with two large juveniles, Flinders Chase National Park, Kangaroo Island, South Australia.

Dave Watts / Cape barren geese (Cereopsis novaehollandiae) grazing, Flinders Chase National Park, Kangaroo Island, South Australia.

Jiri Lochman / Short-beaked echidna (Tachyglossus aculeatus) Willandra Lakes UNESCO Natural World Heritage Site, New South Wales, Australia.

Jiri Lochman / Short-beaked echidna (Tachyglossus aculeatus) Willandra Lakes UNESCO Natural World Heritage Site, New South Wales, Australia.

Jiri Lochman / Short-beaked echidna (Tachyglossus aculeatus) Willandra Lakes UNESCO Natural World Heritage Site, New South Wales, Australia.

Jiri Lochman / Burrowing bettong (Bettongia lesueur), Shark Bay UNESCO Natural World Heritage Site, Western Australia. An endangered species restricted to Shark Bay and Barrow Island

Dave Watts / Australian pelican (Pelecanus conspicillatus) flying in to land on the water Kangaroo Island, South Australia

Dave Watts / Australian pelican (Pelecanus conspicillatus) in flight. Kangaroo Island, South Australia

Dave Watts / Australian pelican (Pelecanus conspicillatus) Kangaroo Island, South Australia

Dave Watts / Tourist feeding Australian pelican (Pelecanus conspicillatus) Kangaroo Island, South Australia

Dave Watts / Rosenberg's goanna (Varanus rosenbergi) termite mound showing hole used as nest by young goannas. Kangaroo Island, South Australia

Dave Watts / Rosenberg's goanna (Varanus rosenbergi) young returning to nest in termite mound. Kangaroo Island, South Australia. Vulnerable species.

Dave Watts / Rosenberg's goanna (Varanus rosenbergi) young returning to nest in termite mound. Kangaroo Island, South Australia. Vulnerable species.

Dave Watts / Rosenberg's goanna (Varanus rosenbergi) young returning to nest in termite mound. Kangaroo Island, South Australia. Vulnerable species.

Dave Watts / Glossy black cockatoo (Calyptorhynchus lathami) male (right) and female. Kangaroo Island, South Australia.

Juergen & Christine Sohns / Little Blue Penguin (Eudyptula minor), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Little Blue Penguin (Eudyptula minor), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Little Blue Penguin (Eudyptula minor) traffic sign, Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Little Blue Penguin (Eudyptula minor) traffic sign, Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Koala (Phascolarctos cinereus) climbing tree, Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Western Grey Kangaroo (Macropus fuliginosus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Western Grey Kangaroo (Macropus fuliginosus), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Western Grey Kangaroo (Macropus fuliginosus) jumping, Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Tammar Wallaby (Macropus eugenii), Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Tammar Wallaby (Macropus eugenii) pair, Kangaroo Island, South Australia, Australia

Juergen & Christine Sohns / Tammar Wallaby (Macropus eugenii) pair, Kangaroo Island, South Australia, Australia

Martin Willis / Red-bellied Pademelon (Thylogale billardierii) feeding on grass, Bruny Island, Tasmania, Australia

Sean Crane / Red-bellied Pademelon (Thylogale billardierii), Maria Island National Park, Tasmania, Australia

Sean Crane / Red-necked Wallaby (Macropus rufogriseus), white-morph mother, with brown joey, Bruny Island, Tasmania, Australia

Sean Crane / Red-necked Wallaby (Macropus rufogriseus), white-morph mother, with brown joey, Bruny Island, Tasmania, Australia

Sean Crane / Red-necked Wallaby (Macropus rufogriseus), white-morph mother, with brown joey, Bruny Island, Tasmania, Australia

Sean Crane / Red-necked Wallaby (Macropus rufogriseus), white-morph mother, with brown joey, Bruny Island, Tasmania, Australia

Sean Crane / Red-necked Wallaby (Macropus rufogriseus), white-morph mother, grooming brown joey, Bruny Island, Tasmania, Australia

Jan Wegener/ BIA / New Holland Honeyeater (Phylidonyris novaehollandiae) pair, Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Glossy Black-Cockatoo (Calyptorhynchus lathami) male spreading wings, Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Glossy Black-Cockatoo (Calyptorhynchus lathami) male, Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Tawny-crowned Honeyeater (Gliciphila melanops), Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Tawny-crowned Honeyeater (Gliciphila melanops) calling, Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Tawny-crowned Honeyeater (Gliciphila melanops), Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Tawny-crowned Honeyeater (Gliciphila melanops), Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / New Holland Honeyeater (Phylidonyris novaehollandiae), Kangaroo Island, South Australia, Australia

Jan Wegener/ BIA / Australian Pelican (Pelecanus conspicillatus) preening, Kangaroo Island, South Australia, Australia

Dave Watts / Australian sealion (Neophoca cinerea) group of three hauled out on beach, Kangaroo Island, South Australia. Endangered species.

Dave Watts / Australian sealion (Neophoca cinerea) group of three hauled out on beach, Kangaroo Island, South Australia. Endangered species.

Dave Watts / Australian sealion (Neophoca cinerea) close up of flipper in sand, Kangaroo Island, South Australia. Endangered species.

Dave Watts / Australian sealion (Neophoca cinerea) hauled out on beach, Kangaroo Island, South Australia. Endangered species.

Tui De Roy / Short-beaked echidna (Tachyglossus aculeatus), Bruny Island, Tasmania, Australia, November.

Tui De Roy / Short-beaked echidna (Tachyglossus aculeatus), Bruny Island, Tasmania, Australia, November.

Tui De Roy / Short-beaked echidna (Tachyglossus aculeatus), Bruny Island, Tasmania, Australia, November.

Charlie Summers / Young Australian sea lions (Neophoca cinerea) practicing courtship behaviour, male on the left, female on the right. Seal Bay, Kangaroo Island, Australia. Small reproduction only.

Sean Crane / Koala (Phascolarctos cinereus), Hanson Bay, Kangaroo Island, Southern Australia

Sean Crane / Capybara (Hydrochoerus hydrochaeris), Yacuma River, Santa Rosa, Bolivia

Sean Crane / Australian Pelican (Pelecanus conspicillatus) resting at the shoreline, Kingscote, Kangaroo Island, Australia

Sean Crane / Sunrise on the Remarkable Rocks, Kangaroo Island, Australia

Sean Crane / Koala (Phascolarctos cinereus) yawning, Hanson Bay Wildlife Sanctuary, Kangaroo Island, Australia

Sean Crane / Koala (Phascolarctos cinereus) clinging to tree trunk, Hanson Bay Wildlife Sanctuary, Kangaroo Island, Australia

Sean Crane / Koala (Phascolarctos cinereus) mother and joey, Hanson Bay Wildlife Sanctuary, Kangaroo Island, Australia

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) close-up of spines, Shark Bay, Western Australia

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) curled into a defensive ball, Shark Bay, Western Australia

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) captive, Currumbin Sanctuary, Queensland, Australia.

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) close-up of spines, captive, Currumbin Sanctuary, Queensland, Australia.

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) portrait, captive, Currumbin Sanctuary, Queensland, Australia.

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) rear view showing spines, captive, Currumbin Sanctuary, Queensland, Australia.

Roland Seitre / Short-beaked echidna (Tachyglossus aculeatus) profile, captive, Currumbin Sanctuary, Queensland, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby licking milk off human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby licking milk off human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby held in woman's hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby held in human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby held in human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby held in human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) captive baby held in human hand, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) curled up in ball, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) curled up in ball, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) close-up of spines, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) curled in defensive ball, Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) underside showing cloaca and mammary glands, Tasmania, captive.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) typical pattern from digging, with ground dug by paws before rostrum is inserted. Australia.

Roland Seitre / Short beaked echidna (Tachyglossus aculeatus) close-up of mouth at the end of its rostrum, Tasmania, captive.

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

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

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

Dave Watts / Short-beaked echidna (Tachyglossus aculeatus) digging, Tasmania, Australia

Dave Watts / Short-beaked echidna (Tachyglossus aculeatus) close up of fur and quills, Tasmania, Australia

Kevin Schafer / Quokka (Setonix brachyurus) mother with joey in pouch, Rottnest Island, Perth, Western Australia, Australia