PLATE IV 



Fig. 1 Herring Gull, Larus argentatus. Brunnich. 



,. 2. Laughing Gull, Chroicocephalus atricilla. Linnaeus. 



., 3 Kitti wake Gull, Eissa tridactyla. Bonaparte. 



,. 4. Wilson's Tern, Sterna Wilsonii. Bonaparte. 



., 5. Least Tern, Sterna frenata. Gambel. 



