BREEDING & NONBREEDING CASPIAN TERNS, WINDERMERE BASIN, HAMILTON, ON

   In the first photo both Caspian Terns are in nonbreeding plumage, although the tern on the right is starting to get the more solid black crown and forehead of the breeding Caspian Tern.  In the second photo the tern that is the third from the right

has the completely black crown and forehead of a breeding Caspian Tern.

   Note the Kildeer in the upper left-hand corner of the second photo.