Juergen Freund / Yellow-bellied gliders (Petaurus australis) tapping Red stringybark (Eucalyptus resinifera) for its sap, Atherton Tablelands, Queensland,Australia.

Juergen Freund / Sugar glider (Petaurus breviceps) at night, Cardwell, Queensland, Australia.

Juergen Freund / Sugar glider (Petaurus breviceps) at night, Cardwell, Queensland, Australia.

Roland Seitre / Sugar gliders (Petaurus breviceps) in nest, Australia. Captive, occur in Australia, Indonesia and Papua New Guinea.

Steven David Miller / Mahogany glider (Petaurus gracilis) in care after an accident sitting in its carer's hands at the Wildlife Habitat, Wildlife Habitat, Port Douglas, Queensland, Australia. Endangered species.

Juergen Freund / Sugar Glider (Petaurus breviceps) feeding on sap from a tree trunk. Atherton Tablelands, Queensland, Australia

Juergen Freund / Sugar Glider (Petaurus breviceps) feeding on sap from a tree trunk. Atherton Tablelands, Queensland, Australia

Juergen Freund / Sugar Glider (Petaurus breviceps) feeding on sap from a tree trunk. Atherton Tablelands, Queensland, Australia

Juergen Freund / Sugar Glider (Petaurus breviceps) feeding on sap from a tree trunk. Atherton Tablelands, Queensland, Australia

Juergen Freund / Striped possum (Dactylopsila trivirgata) feeding on sap from a tree trunk. Atherton Tablelands, Queensland, Australia

Aflo / Sugar Glider (Petaurus breviceps) on branch, Australia, captive

Aflo / Sugar Glider (Petaurus breviceps) on branch, Australia, captive