It’s a boy! In new research from the Australian National University, swift parrot mothers are choosing to hatch their sons earlier than their daughters, meaning they end up with more male offspring. This might seem surprising, because there are fewer female swift parrots than males, but it is actually a clever way of spreading genes. Female swift parrots in Tasmania often get killed and eaten by invasive sugar gliders when they are looking after eggs, but the males don’t. The mother parrots help the male eggs hatch faster, so that they can grow bigger and stronger and fly around breeding ...