Ornithologists describe this behavior as loafing.
In this light you can just make out the beautiful colors of the Reddish Egret; slate gray, chestnut to cinnamon, and neutral grey. The shaggy feathers on the chest are called lanceolate plumes.
This image reminds me of an Arthur Rackham illustration. With his long knobby kneed legs, tucked head and great pointy bill you can easily project human humors onto him.
