The Imp Hawk (ジャリバード Jyari Bird?) (also known as Imp Ace in the SNES/PS version) is an enemy that appears in Chrono Trigger in Truce Canyon in 600 AD. They are always seen holding Blue Imps in their talons. They only possess a single attack, "Screech", but it does a decent amount of damage and applies the Slow status effect to any party member it connects with, so be wary.
They first appear when visiting Truce Canyon (and therefore, the Middle Ages) dropping two Blue Imps after Crono crosses the bridge found in this small area. However, this initial appearance does not result in a fight with the Imp Hawk proper, as Crono instead fights the two Blue Imps by themselves. Slightly later in the game, they can be fought freely in Truce Canyon.