Gretchen suggests that we begin by choosing a symbol for ourselves and our happiness project. She chose a bluebird - bluebird of happiness, ya know.
I like birds, too. In fact, whenever I listen to the birds trilling outside I feel a sense of joy welling up inside me. I can't help but believe that they sing because they like it, it makes them feel good. So a singing bird, even a cawing bird, would make for me a good symbol as well.
I have long been intrigued by birds that sing in the middle of the night. That is really symbolic, I think. I don't care if it's mating season and they want a leg up. I love it. So my bird, my symbol, is the mockingbird.