Dave Watts / Common brushtail possum (Trichosurus vulpecula) feeding at night, Ben Lomond National Park, Tasmania, Australia.

Juergen Freund / Common brushtail possum (Trichosurus vulpecula) with joey. Magnetic Island, Townsville, Queensland, Australia.

Juergen Freund / Common brushtail possum (Trichosurus vulpecula) with joey. Magnetic Island, Townsville, Queensland,Australia.

Juergen Freund / Common brushtail possum (Trichosurus vulpecula) with joey. Magnetic Island, Townsville, Queensland,Australia.

Martin Willis / Common Brush-tailed Possum (Trichosurus vulpecula) crossing road at night, Bruny Island, Tasmania, Australia

Sean Crane / Common Brush-tailed Possum (Trichosurus vulpecula) mother with young at night, Tasmania, Australia

Sean Crane / Common Brush-tailed Possum (Trichosurus vulpecula), golden color morph, Bonorong Wildlife Sanctuary, Tasmania, Australia

Sean Crane / Common Brush-tailed Possum (Trichosurus vulpecula), golden color morph, Bonorong Wildlife Sanctuary, Tasmania, Australia

Sean Crane / Common Brush-tailed Possum (Trichosurus vulpecula) at night, Cradle Mountain-Lake Saint Clair National Park, Tasmania, Australia

Sean Crane / Common Brush-tailed Possum (Trichosurus vulpecula) at night, Cradle Mountain-Lake Saint Clair National Park, Tasmania, Australia

Brent Stephenson / Ranger restocking a poison bait station with bait used to control rodents and Brush-tailed possums (Trichosurus vulpecula) in an intensively managed sanctuary where native bird species are being reint...

Dave Watts / Common brushtail possum (Trichosurus vulpecula) golden colour phase, Tasmania, Australia.

Dave Watts / Common brushtail possum (Trichosurus vulpecula) golden colour phase, Tasmania, Australia.

Dave Watts / Common brushtail possum (Trichosurus vulpecula) golden colour phase, Tasmania, Australia.

Tui De Roy / Australian Brush-tailed Possum (Trichosurus vulpecula) invasive species, adult with young perched on back. Golden Bay, South Island, New Zealand.

Dave Watts / Common Brushtail Possum (Trichosurus vulpecula) female with large joey, Tasmania, Australia.

Dave Watts / Common Brushtail Possum (Trichosurus vulpecula) female with large joey, Tasmania, Australia.

Roland Seitre / Common Brush-tailed Possum (Trichosurus vulpecula) mother and joey in tree, Australia

Laurent Geslin / Common brushtail possum {Trichosurus vulpecula} with baby in tree eating fruit Queensland, Australia

Laurent Geslin / Common brushtail possum {Trichosurus vulpecula} with baby on back, Queensland, Australia

ZSSD / Common Brush-tailed Possum (Trichosurus vulpecula), Lone Pine Koala Sanctuary, Brisbane, Australia

Martin Willis / Common Brush-tailed Possum (Trichosurus vulpecula) at night, Cradle Mountain-Lake Saint Clair National Park, Tasmania, Australia

Martin Willis / Common Brush-tailed Possum (Trichosurus vulpecula) at night, Cradle Mountain-Lake Saint Clair National Park, Tasmania, Australia

Martin Willis / Common Brush-tailed Possum (Trichosurus vulpecula) in tree at night, Bruny Island, Tasmania, Australia

Konrad Wothe / Common Brush-tailed Possum (Trichosurus vulpecula) curled up in a ball sleeping, Atherton Tableland, Queensland, Australia

Steven David Miller / Common Brushtail possum (Trichosurus vulpecula)foraging for food in the late evening (captive) Mount Field National Park in Tasmania. Australia

Steven David Miller / Common Brushtail possums (Trichosurus vulpecula) sleeping in hollow tree, Devils Heaven Wildlife Park(captive) Launceston, Tasmania, Australia

John Cancalosi / Common brushtail possum {Trichosurus vulpecula} young suckling on teat in mother's pouch, Australia, captive

Colin Monteath / Warning sign of cyanide bait drop to kill introduced Common Brush-tailed Possum (Trichosurus vulpecula), Haast Pass, New Zealand

Tim Laman / Common brushtail possum (Trichosurus vulpecula) in tree, Queensland, Australia

Jouan & Rius / Common / Silver-gray brushtail possum (Trichosorus vulpecula) in tree, Yarra Ranges, Victoria, Australia

Jouan & Rius / Silver-grey Brushtail possum (Trichosurus vulpecula), Lamington National Park, Queensland, Australia

Shaun Barnett / Common Brush-tailed Possum (Trichosurus vulpecula) nursing, Coromandel, New Zealand

Dave Watts / Female Common Brushtail Possum (Trichosurus vulpecula) carrying young on back, Tasmania, Australia

Steven David Miller / Common brushtail possum head portrait {Trichosurus vulpecula} Lamington NP, Australia.

Dave Watts / Common brushtail possum {Trichosurus vulpecula} captive, Australia.

Dave Watts / Common brushtail possum with young {Trichosurus vulpecula} captive, Australia.

Pete Oxford / Common brushtail possum {Trichosurus vulpecula} portrait in tree, Maria island, Tasmania.

Tim Edwards / Common brushtail possum {Trichosurus vulpecula} foraging, Australia.

Steven David Miller / Common Brushtail Possum (Trichosurus vulpecula arnhemensis) in tree at night, Northern Territory, Australia.

Steven David Miller / Common Brushtail Possum (Trichosurus vulpecula arnhemensis) in tree at night, Northern Territory, Australia.

Steven David Miller / Common Brushtail Possum (Trichosurus vulpecula arnhemensis) in tree at night, Northern Territory, Australia.

Steven David Miller / Common Brushtail Possum {Trichosurus vulpecula} mother and young possum peering out of tree den, mother emerging, Queensland, Australia.

Steven David Miller / Common Brushtail Possum {Trichosurus vulpecula} young possum on its mother's back, Queensland, Australia.

Steven David Miller / Common Brushtail Possum {Trichosurus vulpecula} young possum on its mother's back, Bargarra, Queensland, Australia.

Steven David Miller / Common Brushtail Possum {Trichosurus vulpecula} juvenile peering out from tree den, Queensland, Australia.

Steven David Miller / Common Brushtail Possum {Trichosurus vulpecula} adult peering out from tree den, Queensland, Australia

Tim Edwards / Brushtail possum carrying young (Trichosurus vulpecula) Australia

Pete Oxford / Common brushtail possum {Trichosurus vulpecula} up in tree at night, Maria Island, Tasmania

Steven David Miller / Common brushtail possum {Trichosurus vulpecula vulpecula} Lamington NP, Australia

Andrew Parkinson / Woman feeding Common brushtail possom {Trichosurus vulpecula} wild in urban park in Hervey Bay, Queensland, Australia

Andrew Parkinson / Common brushtail possom {Trichosurus vulpecula} wild in urban park in Hervey Bay, Queensland, Australia

Andrew Parkinson / Common brushtail possom {Trichosurus vulpecula} wild in urban park in Hervey Bay, Queensland, Australia

Dave Watts / Common Brushtail Possum {Trichosurus vulpecula} mother carrying young on back, captive, Tasmania, Australia.

Dave Watts / Common Brushtail Possum {Trichosurus vulpecula} mother carrying young on back, captive, Tasmania, Australia.

Dave Watts / Common Brushtail Possum (Trichosurus vulpecula) Young suckling in pouch, Tasmania, Australia

Dave Watts / Common Brushtail Possum (Trichosurus vulpecula) Young suckling in pouch, Tasmania, Australia

Steven David Miller / Common brushtail possum mother carrying young {Trichosurus vulpecula} Grampians, Victoria, Australia

John Cancalosi / Common brushtail possum baby suckling in pouch {Trichosurus vulpecula} New Zealand, captive

John Cancalosi / Tiny baby Common brushtail possum in pouch {Trichosurus vulpecula} captive

Mitsuaki Iwago / Common Brush-tailed Possum (Trichosurus vulpecula) introduced for fur is now the top pest which damages forests and kills birds, Australia

Michael & Patricia Fogden / Common Brush-tailed Possum (Trichosurus vulpecula), New Zealand

Gerry Ellis / Common Brush-tailed Possum (Trichosurus vulpecula) portrait, south and east Australia

Tui De Roy / Common Brush-tailed Possum (Trichosurus vulpecula) introduced for fur is now top pest which damages forests and kills birds, Golden Bay, New Zealand

John Cancalosi / Common brushtail possum {Trichosurus vulpecula} newborn young suckling in mother's pouch, New Zealand, captive

Tim Edwards / Brushtail possum (Trichosurus vulpecula) carrying young. Australia

Pete Oxford / Common brushtail possum, Maria Island, Tasmania

Dave Watts / Common brushtail possum carrying young {Trichosurus vulpecula} Australia

Roland Seitre / Common Brush-tailed Possum (Trichosurus vulpecula) in tree, Stirling Range National Park, Western Australia, Australia

John Cancalosi / Common brush tailed possum in pouch (Trichosurus vulpecula) Sucking attached to nipple. captive, Brush-tailed possums carry babies in their womb for just 17 days. When they are born the blind, embryon...

Suzi Eszterhas / A rescued Brush-tailed possum (Trichosurus vulpecula) albino, sitting on shoulder of wildlife sanctuary director, feeding, Bonorong Wildlife Sanctuary, Tasmania, Australia. October, 2015.

Suzi Eszterhas / Common brushtail opossum (Trichosurus vulpecula) infant, wrapped in a blanket being held by veterinary assistant. Rescued after it was injured when its tree was chopped down, Currumbin Wildlife Hospit...

Joel Sartore / Photo Ark / Common brushtail possum (Trichosurus vulpecula) portrait, Kiwi Birdlife Park, New Zealand. Captive.

Joel Sartore / Photo Ark / Common brushtail possum (Trichosurus vulpecula) sitting upright, portrait, Kiwi Birdlife Park, New Zealand. Captive.

Joel Sartore / Photo Ark / Common brushtail possum (Trichosurus vulpecula vulpecula) juvenile, portrait, Australian Bat Clinic and Narrow Leaf Retreat. Captive.

Joel Sartore / Photo Ark / Common brushtail possum (Trichosurus vulpecula vulpecula) juvenile, looking up with paw raised, portrait, Australian Bat Clinic and Narrow Leaf Retreat. Captive.

Bruce Thomson / Common brushtail possum (Trichosurus vulpecula), golden colour form, in tree at night, Maria Island, Tasmania Australia.

Bruce Thomson / Female Brush-tailed possum (Trichosurus vulpecula) with joey in suburban back garden, Toowoomba, Queensland, Australia.

Bruce Thomson / Common brushtail possum (Trichosurus vulpecula) female carrying young while grooming in a tree at night, Toowoomba, Queensland, Australia.

Bruce Thomson / Close up shot of Common brushtail possum (Trichosurus vulpecula), female carrying young, climbing down a tree at night, Toowoomba, Queensland, Australia.

Jiri Lochman / Northern brushtail possum (Trichosurus vulpecula arnhemensis) white morph. Captive.

Jiri Lochman / Northern brushtail possum (Trichosurus vulpecula arnhemensis), at night on Barrow Island, Western Australia.

Jiri Lochman / Northern brushtail possum (Trichosurus vulpecula arnhemensis), at night on Barrow Island, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula fuliginosus) female carrying young, Cradle Mountain National Park, Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula fuliginosus) female carrying young, Cradle Mountain National Park, Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos) drinking, Waychinicup National Park, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos), juvenile, Dryandra Forest, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos), Leeuwin Naturaliste National Park, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos) female carrying out-off-pouch young, Waychinicup National Park, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos) female carrying out-off-pouch young, Waychinicup National Park, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula hypoleucos) female and young consuming Beard Heath flowers (Leucopogon sp.), Waychinicup National Park, Western Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula vulpecula) female suckling out-off-pouch young, Sundown National Park, Queensland, Australia.

Jiri Lochman / Common brushtail possum (Trichosurus vulpecula vulpecula) female with an out-off-pouch young, Sundown National Park, Queensland, Australia.

Doug Gimesy / Brushtail possum (Trichosurus vulpecula) rescued female baby, in its enclosure. Apollo Bay, Victoria, Australia November 2020.

Doug Gimesy / Brushtail possum (Trichosurus vulpecula) rescued female baby, cuddling an orange teddy bear, eating some orange, held by wildlife rescuer Heather Kiley. Apollo Bay, Victoria, Australia. Editorial use...

Doug Gimesy / Brushtail possum (Trichosurus vulpecula) rescued female baby, cuddling a orange teddy bear, eating some orange. Apollo Bay, Victoria, Australia