In what continent are kookaburras and koalas located?

Australia.

Koalas are particular to eastern Australia, and can be found along the eastern and south-eastern coastal regions. They are found in Queensland, New South Wales, Victoria and the eastern part of South Australia. They have also been introduced to national parks in southwest Western Australia. They live in cool temperate zones, right up to hot, sub-tropical zones. Koalas live in a range of habitats, as long as there are abundant eucalyptus trees of the sort they prefer. They are found on coastal islands, tall eucalypt forests, bushland and low woodlands inland.