November 1954 – vol. 47, issue 11–394 (Plates 61-64). T H E Caspian Tern (Hydroprogne caspia) is perhaps the most impressive of all the terns on account of its large size, approaching: that of the Herring Gull (Larus argentatus), and because of its massive, shining orange-red bill, of which a very good impression is given by plate 6 1 . This plate also shows the typical tern summer colouring of grey and white with a black cap which, h... This article is only available to registered users.To read more, please log in or purchase a subscription.