Devil bird

Devil birds were creatures that existed within the Slinths dreamscapes

Several devil birds menaced Lyan Berrace before being defeated by her fiancé Karith. Later, some flying Nymphs transformed into devil birds to attack the Fourth Doctor, Sharon Davies and others within Vernor Allen's dreamscape. (COMIC: Dreamers of Death)

Behind the scenes
The devil birds were visually similar to the Malevilus previously encountered by the Fourth Doctor in Doctor Who and the Iron Legion.