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
Fauna of the United States state. Alaska has also over 430 species of birds and the largest population of bald eagles in the nation. From pygmy shrews that weigh less than a penny to gray whales that weigh 45 tons, Alaska is the "Last Frontier" for animals as well as people. Many species endangered elsewhere are still abundant in Alaska. The Aleutian Islands are home to an abundance of large bird colonies; more than 240 bird species inhabit in Alaska's Aleutian Archipelago. Large seabird colonies are present on islands like Buldir Island, which has 21 breeding seabird species, including the Bering Sea-endemic red-legged kittiwake. Large