 Yellow @-@ tailed black cockatoos can cause damage in pine and eucalyptus plantations by weakening stems through gouging out pieces of wood to extract moth larvae . In places with these gum plantations , the population of the larva of the cossid moth <unk> <unk> grows , which then leads to increased predation ( and hence tree damage ) by cockatoos . Furthermore , plantations generally lack undergrowth which might have prevented cockatoos from damaging younger trees . Yellow @-@ tailed black cockatoos were shot as pests in some districts of New South Wales until the 1940s because of this . The yellow @-@ tailed black cockatoo is promoted by the Shoalhaven City Council local government on the NSW south coast as the region 's bird . Within the Jervis bay area the birds can be seen feasting on the many casuarina trees native to the area . 
