by Pajarita » Fri Jul 25, 2014 9:55 am
Very few species of birds have feathers all over their bodies (penguins do), most species grow their plumage in feather tracts which are 'stripes' of skin where feathers grow from and, between these 'stripes', there are bald spaces (the feather tracts are called 'pterylae' and the bald spots are called 'apterylae'). Sometimes there is down on the apterylae but no contour feathers (the little round or oval shaped ones that cover the body of the bird).
The feathers grow in different directions on the body (depending on where they are and what they are for) and because of this characteristic, when the plumage is healthy and dry, we don't see the skin but, when the feathers are wet, they stick and clump together showing the bald skin under. So nothing to worry about, it's normal.