Royal Tern

This Royal Tern is a winter bird with white forecrown.

{I had recorded this in my notes from 2010 as a Caspian Tern (Hydroprogne caspia), but with the caveat that the ID required confirmation. A reconsideration suggested to me that it was actually a Royal Tern, and I put this image to the Bird Identification Help Group here on Flickr which verified that.}

This sighting was during a kayak excursion at the Laguna de Potosí south of Zihuatanejo, Guerrero State, Mexico, on February 23rd, 2010.

Done