A wide variety of beautiful native plants and trees grows here. The magnificent Banksia serrata, easily identified by its gnarled truck and limbs, sawtooth leaves and large bottle brush flowers, is unique to this part of Tasmania, and as a result is a protected species. Mighty gums tower above the paperbark tea-trees along the edges of the dark tannin stained water of the creek. Sedge, grasses and ferns form the understorey.
The area abounds in wildflowers with patches of colour all year round. Tiny orchids reward those who take the time to look, and many even pop up in back yards.
Grass trees shoot up their amazing flowering spikes, and put on a striking display especially after a bush fire. Christmas bells, which are so named because they usually appear around December, provide bright splashes of red and gold.
Along the beach the local pigface, native grasses, correas and coastal wattle (which is known locally as boobialla) hold the sand dunes together. Even though Marram Grass is an introduced species, it also helps in the important job of preventing erosion.
Sisters Beach and the surrounding National Park have an amazing amount of birdlife. One hundred and twenty-five different species of bird have been identified and recorded here, including ten of the twelve bird species endemic to Tasmania.
The Yellow-tailed Black Cockatoos make their presence known with loud squawks as they fly in, sometimes in large flocks. They look for food in the native banksias and grasstrees, and even in the cones of the old Radiata pines which were planted by the early settlers of Sisters Beach.
The majestic White-breasted Sea Eagle regularly soars across the bay. Quiet, colourful little honey-eaters are often seen. Eight of the ten Tasmanian species of honey-eaters have been recorded.
Common native animals include the Ringtail, Brushtail & Pygmy Possums, Bennett’s & Rufous Wallabies, Tasmanian Devil, Echidna, Southern Brown and Eastern-barred Bandicoots, Spotted Quoll (tiger cat), Blue-tongue Lizard, various skinks, snakes, and frogs. All Australian native animals are protected.
The unfenced road winding into Sisters Beach is used by many native animals. To reduce the chance of hitting animals drive slowly at night and during dusk and dawn. This is when animals are more likely to be on the move.