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Allocasuarina are trees endemic to Australia, occurring primarily in the south.

Allocasuarina trees are notable for their long, segmented branchlets that function as leaves. Formally termed cladodes, these branchlets somewhat resemble pine needles, although sheoaks are actually flowering plants. The leaves are reduced to minute scales encircling each joint. Fallen cladodes form a dense, soft mat beneath sheoaks, preventing the development of undergrowth and making sheoak woods remarkably quiet.

Another characteristic feature are the spiny “cones”, about the size of an acorn but with a texture more resembling a conifer cone. However, sheoak “cones” are actually a woodyfruit. Male specimens bear no fruit and are sometimes colloquially referred to as a “heoak”.

As with legumes, sheoak roots possess nodules containing symbiotic nitrogen fixing bacteria; together with their highly drought-adapted foliage, this enables sheoaks to thrive in very poor soil and semi-arid areas. However, sheoaks are much less bushfire-tolerant than eucalypts. 

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Gilbert's Potooroo

Gilberts Potoroo is endemic to south-west Western Australia and is known to occur in the wild at one very small site on the Mt Gardner headland in Two Peoples Bay Nature Reserve. The species was thought to be extinct from the early 1900s, until it was rediscovered in 1994 on the Mt Gardner headland. The extent of occurrence for Gilbert’s Potoroo is estimated to be 8km² and its area of occupancy is less than 5km². READ MORE

Glossy Black-cockatoo

The Glossy Black-Cockatoo (Kangaroo Island) inhabits woodlands that are dominated by Drooping Sheoak and often interspersed with taller stands of Sugar Gum. These woodlands occur in small gullies adjacent to cleared land in coastal and sub-coastal areas, generally on shallow acidic soils on the steep and rocky slopes of gorges and valleys, along inland creek and river systems. The Glossy Black-Cockatoo (Kangaroo Island) occasionally utilises other tree species, including Blue Gum and Manna Gum for breeding and Slaty Sheoak for foraging. READ MORE

Corangamite Water Skink

An olive-brown reptile growing to 80mm with head variegated with black and scattered black scales on the back, a broad, dark upper side zone from below the eye to the base of the tail, scattered small white/cream spots, whitish lower flanks with scattered black scales, white belly, limbs variegated with black and throat spotted with black. READ MORE