The now (in)famous Little Blue X Tricolored Heron at Hammonasset (usually in the Boulder Pond) is now being seen (and misidentified as an adult Little Blue) on a daily basis. This is a very interesting and long-staying summer resident at Hammo, so it's worth getting to know. There are good photos on eBird by Gail Martino and others.
Key features: 1/ Uniform head and body color (as opposed to contrasting purplish head and neck on adult Little Blue) 2/ inconspicuous white areas on the "thighs," as small spots on the throat and sometimes visible on a folded wing. 3/ long powerful-looking beak.
Lighting can make 1/ tricky to perceive; posture and lighting can obscure 2/; and 3/ is somewhat subjective. Slow down and look carefully. Little Blues may also be present