Blue-winged kookaburra highly aggressive in the first week of life, and the youngest chick is often killed by the older chicks during this period. Once fledged, juvenile birds need to be taught how to hunt by their parents for a further 6–10 weeks before they can properly fend for themselves. The red goshawk and rufous owl prey upon the blue-winged kookaburra. Adult birds are also slow flyers and vulnerable to being hit by cars on country roads. Nests are susceptible to raids by Olive Pythons, quolls and goannas. Blue-winged kookaburra The blue-winged kookaburra ("Dacelo leachii") is a large species of kingfisher native
Invasive species of Australian origin coastal wattles, introduced to help bind drifting sand dunes. They remain serious pests, but some controls have been introduced. In the case of "Acacia saligna", the introduction of acacia seed weevils ("Melanterius" species) has achieved complete control. A lesser degree of control has been achieved for "Acacia cyclops" by the introduction of a gall rust fungus ("Uromycladium" species). Invasive species of Australian origin There are a number of Australian species that have become invasive when introduced into outside Australia or outside Oceania. The Australian magpie was introduced into New Zealand and are considered to be a pest because of attacks