An acoustic postconflict display in the duetting tropical boubou (Laniarius aethiopicus): a signal of victory?
We conclude that, most likely, the investigated duet type is a postconflict victory display - a novel function of duets. Furthermore the duet is a rare example among birds of a context-specific song. The conspicuousness of the display suggests that it is directed not only to losers of an agonistic encounter but also to other pairs of birds in neighbouring territories.
Low-dose epidural infusions of fentanyl produce labor analgesia by a primary spinal action.