A birb designed to explode at a preset time. Indeed, birbs aren't real. They never were.
Spy 1 : Alright, we’re at the target. Time to get to work.
Spy 2 : Copy that. I’ll keep watch. You plant the birb bomb.
birb: chirp......chirp...chirp...chirpchirpchirpchirp KÅ BÖŌM!!!