Migrating birds

Michael has a new passport. It contains a wide selection of images of British birds. However, the note that came with it, full of puff about the high tech security features, fails to describe the birds! A great deal of effort with Google reveals one leaflet about the birds (here, on a very unofficial site), but the bird on the "chip" page is unnamed. Does anyone know what it is? It's pictured in the leaflet I've linked- twice, in fact.