I don't know who enjoys taking a dip in the birdbaths more: robins or blue jays. Both of them linger a long time, and whip themselves into these ecstatic frenzies of bathing, shaking, and shimmey-ing. Water splashing high out of the baths. Again and again and again. I don't know if one could look in the Audubon's Birds of North America Encyclopedia (one of my treasured, few possessions) and even find an article on bird ecstasy, much less on how to spot it. It's something you just know when you see it.
I just watched a pair of blue jays fly from bath to bath to bath, sampling all of them with great zeal, following each other, and looking positively silly with their water-logged crests, bending downward from the cherry-tree branch to take a look into the back porch, where the kitchen window is. (I think they sensed someone watching.) Occasionally their exclamations can be heard ... "Heya! Heya!" Exuberance, plain and simple!
Meanwhile, there is a family of squirrels (Mom and 3 youngsters) chasing each other, and rolling and tumbling together, doing somersaults, making astounding leaps up onto the oak tree from the ground --- having a ball!
A thrasher is doing excavation around one of the baths, throwing leaves high up into the air behind him, as a towhee watches him from one of the branches ... as a mockingbird watches the towhee watching...
Spring is very nearly here and spirits are high!
