by Elio — Cuckoo birds have an un­sa­vory rep­u­ta­tion for lay­ing their eggs in some­body else's nest. There the eggs are tended with care by duped sur­ro­gate par­ents. When hatched, the young cuck­oos un­cer­e­mo­ni­ously push their nest­mates over the edge and, in a case of con­sum­mate avian chutz­pah, open their maw to...