Male is almost stark white above and black below; has long, broad white supercilium, white panels on wings and black tail. Female mostly grey-brown above and pale greyish below; female of eastern race australorientis has more rufous on rump and tail. Juvenile is spotted brown and buff. Can be seen singly, or in pairs; gregarious; often in mixed foraging flocks; arboreal; active hunter at canopy level.