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
Kookaburra III during the 101 races of the defender selection series. The end of the selection round robins series found "Kookaburra III" the leading yacht, with 83 points, followed by "Australia IV" at 77 and "Kookaburra II" at 70. "Steak and Kidney" was eliminated on points halfway through the final round. With ongoing protests over the legality of "Australia IV"'s balloon jib, an agreement was reached in which "Australia IV" and "Kookaburra III" would race in a best of nine set. The winning syndicate could then use "Kookaburra II" as the defender yacht if they so chose. Keel modifications to "Kookaburra III"