Northern Mockingbird immature

This Northern Mockingbird that was one of several at Cove Island Park in CT on my second visit to the Fork-tailed Flycatcher. Mockingbirds were harassing the FTFL quite a lot that day - I've had a persistent problem with winter-territorial mockingbirds in my back yard as they can be quite belligerent. This individual was a little tamer and often this is seen with immature birds. Correspondingly the somewhat sharper tail feather profile suggests first winter age, as does the gray iris. Pyle's ID book warns that eye color is not definitive and that some adults can show green or even gray, but in this case it's nicely consistent with the tail profile. This bird is also a little browner than most around the throat and shows quite a bit of yellow in the gape.