Oystercatchers sleep with one eye open so they can keep a look out for dogs and humans, study says
Oystercatchers sleep with one eye open while roosting on the ground so they can keep a look out for dogs and humans, study says Birds use ‘peeking’ to sleep, meaning they keep opening one eye to spot danger Near-threatened species did this ‘significantly more’ when humans were near Scientists said that dogs represented a ‘real … Read more