galston gorge is also home to many native birds, mammals and reptiles. approaching berowra creek, rainforest vegetation becomes dominant. stands of grey myrtle "backhousia myrtifolia", ferns and water gums can be found in this area. possums and other nocturnal marsupials also reveal themselves at night, so commuters must take extra care when driving at night due to low visibility and the tight hairpin corners. along the benowie walking track, commonly found flora includes sydney blue gum, blackbutt, she oak, sydney peppermint and smooth-barked apple mixed with coachwood, blackwattle and pittosporum. commonly seen birds include honeyeaters, fantails, parrots, and various species of waterbirds such as the pied cormorant, white faced heron and dusky moorhen. more rarely, satin bowerbirds and lyrebirds may also be seen.