[Mystery birds] Tri-Colored Heron, Egretta tricolor, photographed at Quintana, Texas. [I will identify this bird for you tomorrow]
Image: Joseph Kennedy, 1 March 2009 [larger view].
Nikon D200, Kowa 883 telescope with tsn-pz camera eyepiece 1/250s f/8.0 at 1000.0mm iso400.
Please name at least one field mark that supports your identification.