The White-tailed Blue Flycatcher is an African flycatcher that may fan its long tail. It joins mixed-species feeding flocks in forests and miombo.
The male is cobalt blue above and on the throat, paler below. Females and immatures are greyer, with blue edging on the wings and tail; the outer tail feathers are white.
It lives in forests and dry savanna, eats insects, and may forage in mixed-species flocks.
It builds a compact cup-shaped nest and lays one or two white eggs.
Both parents feed the young, sometimes helped by nonbreeding adults or immature birds in the group.
In Nyika National Park it occurs along riparian forest edges with Acacia abyssinica and in adjacent miombo woodland.
An extinction-risk assessment has not been added yet.