The tail is black and the wings are dark contrasting with a white rump.

Blanket - A white rump or back with spots of any colour.

They are light gray on top with a white rump and a white underside.

The male is black except for a white rump, wing patch and lower belly.

The adults are bluish slate above, with a white rump.

This bird has a short dark bill, yellow legs and a black band at the end of the white rump.

In flight it shows a white rump and a black T-shape on its tail.

Their most obvious feature is their white rump as they fly.

The juvenile can be told by its white rump.

The female is entirely dark brown apart from the white rump and outer tail.