blue morph Green Jay

tags: Green Jay, Cyanocorax yncas, Blue Morph, birds, mystery bird, bird ID quiz [Mystery bird] Blue Morph Green Jay, Cyanocorax yncas, photographed at Laguna Atascosa Refuge, Harlingen, Texas. [I will identify these birds for you in 48 hours] Image: Joseph Kennedy, 8 April 2008 [larger view]. Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/80s f/8.0 at 1000.0mm iso400. Please name at least one field mark that supports your identification. You might be interested to read an article I wrote about schemochromes and the physics of blue coloration in birds. This piece was…