Yellow-bellied Glider

Fascinating facts about the Yellow-bellied Glider

• A yellow-bellied glider can glide 50 metres through the forest canopy — the length of two Olympic swimming pools — by stretching a membrane between its limbs and adjusting its tail like a rudder. They launch from treetops and land with such precision they can target a trunk 40 metres away in near-total darkness. This isn't flight; it's controlled falling, powered by physics and a nervous system that calculates wind drift faster than conscious thought.
• These gliders spend most of their time chasing sap. They gouge V-shaped cuts into eucalyptus bark with their teeth, then return over weeks to lap up the flowing sap — a diet so nutrient-poor that they must eat from 50 to 100 trees per night to survive. A single glider might visit the same tree dozens of times, creating a mental map of its territory's liquid pantry that it passes down to its offspring.
• A yellow-bellied glider's grip uses friction rather than sharp claws. Their fingertips have ridged skin pads almost identical to human fingerprints, which allow them to cling to smooth bark or glass with astonishing adhesion. Researchers have filmed them scaling near-vertical tree trunks with the control of a rock climber — essential when a slip means a 30-metre fall into darkness.
• Mated pairs sing back and forth across the forest at night in a duet so loud — a shrieking, churring chorus — it can be heard from 400 metres away through dense woodland. This vocal duet reinforces their bond and advertises territory to rivals. They're monogamous for life, which is rare among marsupials, and both parents invest heavily in rearing young.
• Once found across eastern Australia, yellow-bellied gliders have vanished from 90 per cent of their former range in just 50 years, replaced largely by plantations and fragmented forests. A single glider needs up to 50 hectares of continuous forest canopy to forage — a distance most individuals will never travel in their 10-year lifespan. Their dependence on old-growth eucalyptus and unbroken canopy corridors makes them a warning: this species is invisible until it's gone.

At a glance

About the Yellow-bellied Glider

In the moonlit eucalyptus forests of eastern Australia, a whispered rustle of leaves heralds the nocturnal wanderings of the yellow-bellied glider, its large, round eyes shining like lanterns as it flits effortlessly from branch to branch. With a membrane stretching from wrist to ankle, this remarkable marsupial sails through the darkness, its gentle whoops echoing through the trees as it searches for sap and nectar to sustain it. As it glides, its yellow belly glowing like a tiny sun, the yellow-bellied glider embodies the very essence of Australia's mystical night world.

Discover more wildlife