Black-headed Gull; Gaviota Reidora

In the first picture the Black-headed Gulls are mixed in with Mediterranean Gulls and it will be seen from pictures 2 & 3 that the Black-headed Gull actually has a brownish hood which does not cover the nape. <br><br>The Mediterranean Gull has a jet-black hood which does cover the nape, see the following picture: http://www.projectnoah.org/spottings/30399219 Note also the lack of black on the wing tips.