Southern Boobook

The Southern Boobook is Australia's smallest and most widely distributed owl, a compact bird with a rounded head, dark facial disc surrounding large yellow-green eyes, and rich brown plumage spotted and mottled with white and buff across the upperparts and underparts. Its overall coloration varies geographically, from dark chocolate-brown in wetter forested regions to paler, greyer forms in arid parts of the continent.

Despite being common and widespread, the Southern Boobook is far more often heard than seen, given its strictly nocturnal habits and tendency to roost quietly in dense foliage or tree hollows during the day, relying on cryptic plumage for camouflage.

Its familiar, far-carrying two-note call has made it one of the best-known sounds of the Australian night, giving rise to its onomatopoeic common names 'boobook' and 'mopoke', both widely used across the country.

Key field marks

• Small, compact owl with a rounded head and no ear tufts
• Dark facial disc contrasting with large yellow-green eyes
• Rich brown plumage spotted with white and buff
• Distinctive repeated two-note 'boo-book' or 'mo-poke' call

Similar species

The Powerful Owl and Barking Owl are both considerably larger with different underpart patterning and calls. The Southern Boobook's small size, rounded head without ear tufts, and instantly recognisable two-note call readily distinguish it from all other Australian owls.

Habitat

This adaptable owl occupies a wide range of wooded habitats, including eucalypt forest, woodland, mallee, and well-treed urban parks and gardens, wherever suitable roosting cover and prey are available.

Range

The Southern Boobook is found throughout mainland Australia and Tasmania, and closely related boobook forms occur in New Zealand, where the species is known as the Morepork, and on various nearby islands.

Migration

Most populations are sedentary, holding stable territories, though some individuals, particularly in cooler regions, may move short distances seasonally.

Behavior

Southern Boobooks are strictly nocturnal, spending the day roosting quietly in dense foliage or tree hollows and becoming active at dusk to hunt from perches around forest edges, clearings, and gardens.

Voice

Its familiar call is a clear, repeated two-note 'boo-book' or 'mo-poke', often given through the night, especially in spring and summer during the breeding season, giving the species both its common names.

Feeding

It hunts mainly from a perch, dropping onto prey on the ground or catching flying insects in the air; its diet includes moths, beetles, and other large insects, as well as small mammals such as mice and occasionally small birds.

Nesting and breeding

Pairs nest in tree hollows, laying two to three eggs which the female incubates while the male provides food; the pair defends the nesting territory and young owlets remain near the nest hollow after fledging while still dependent on their parents.