An Australasian flycatcher that has a gray-brown back and whitish underside and constantly wags its white-edged tail.
- ‘The Jacky Winter is a small grey-brown flycatcher with a faint pale eye-line and white underbody. The dark tail has prominent white outer feathers which are obvious when it lands, wagging his tail from side to side.’
- ‘Jacky Winters dart out from a perch to snatch at flying insects, returning to the same perch again. They dive and twist in the air, hovering and grabbing at insects.’
Late 19th century: diminutive form of the nickname Jack (see jack) + Winter (imitative of the bird's cry).