This year’s Advent Calendar is packed full of brand new projects, and we have another one for you today – Project Plumage

Researchers from the Natural History Museum in London need your help to identify plumage patches and measure the spectacular diversity of bird colouration. Be one of the first to volunteer on this project at www.zooniverse.org/projects/ghthomas/project-plumage.

WARNING: if you are squeamish about pictures of dead birds, this is not the project for you.