Kumlien's-Thayers Gulls - 30 October 2005.

 Scroll down for four photos of two Markham gulls showing the Kumlien's-Thayers Gull cline.

Gull 1

 Gull 1. Third basic Kumlien's-Thayer's showing dark primaries with pale tips. Brown eye.


Gull 1. Same as in first photo above.


Gull 2

Gull 2. Definitive basic Kumlien's-Thayer's Gull with black primary pigmentation and dark eye.


Gull 2. Same Kumlien's-Thayer's Gull indicating the cline between Iceland and Thayer's Gulls. P10 is still growing.