Kakadu
Kakadu is the German word for cockatoo 
Kakadu may refer to:

Places
Australia
Kakadu National Park, a protected area
Kakadu Highway, a highway in the Northern Territory
Kakadu, Northern Territory, a locality

Plants and animals
Australia
Kakadu dunnart, a species of dunnart
Kakadu pebble-mound mouse, a species of  rodent
Kakadu plum, a species of flowering plant
Kakadu woolly-butt, a species of  tree
Kakadu sand goanna, a species of monitor lizard
Kakadu vicetail, a species of dragonfly

Arts and entertainment
Kakadu Variations, by Ludwig van Beethoven
Kakadu und Kiebitz, a 1920 German silent film
Kakadu (Sculthorpe), an orchestral composition by Peter Sculthorpe

Other
Kakadu language, an extinct Australian Aboriginal language
Kakadu (people), an Australian Aboriginal people
Kakadu (sailplane), a large sailplane built in 1928 by Julius Hatry
Kakadu (software), a software library for encoding and decoding JPEG 2000 images
Kakadu Storm, a rugby team in the Darwin Rugby League