Yellow-crowned night heron

Juvenile Yellow-Crowned Night Heron, Nyctanassa Violacea

It's not every day I see one of these on the lake. I believe it's a juvenile yellow-crowned night heron (Nyctanassa violacea). I initially thought it was a juvenile black-crowned night heron but then found a guide on an Audubon forum explaining how to differentiate one from the other. 

But really, it's still a bit hard for me, since I don't see these all that often.