Birds lack arms in more ways than one. Avian equivalents of antlers, horns, tusks and canine teeth are few and far between – only about two per cent of our feathered friends possess specialised weapons in the form of spurs on their legs and…

Birds lack arms in more ways than one. Avian equivalents of antlers, horns, tusks and canine teeth are few and far between – only about two per cent of our feathered friends possess specialised weapons in the form of spurs on their legs and…