At the rookery next to the Welcome Center at Ocean City, NJ, I saw a Little Blue Heron and its juvenile child. Their colors confused me at first. Juveniles are white, while adults are deep blue and purple. The rookery also had white egrets, both Great Egret and Snowy Egret, which added to my confusion.
The one way I could be sure was when parent and juvenile were together, as when the parent brought food home for the hungry juvenile.