Unlike other kingfishers, kookaburras are sedentary and territorial year-round. They spend a great deal of energy in boundary-marking displays, and their vocalizations sound like barks and hiccups. They are sexually dimorphic; the male has a blue tail while the female has a rufous tail with black bars.
Pairs remain together until one of them dies. Kookaburras are cooperative breeders, consisting of a breeding pair and helpers to rear the chicks. They nest in old trees with hollows.