No, after you

2019-03-07 05:10:04

By Joanna Marchant BARN owls have the politest children. Instead of badgering their parents and fighting over the next meal, chicks negotiate with each other so the hungriest can eat first. Most scientists have assumed that nestlings cry out purely to attract the attention of their parents. But in many bird species, chicks call all night, even when the parents aren’t around. Zoologist Alexandre Roulin wondered whether these nestlings are actually communicating with each other. So Roulin, of the University of Bern, Switzerland,