Yep. They don't taste too bad, either. You can get a bit of money from selling them to restaurants, etc. if you're very meticulous about breeding the birds (making sure they're healthy, clean, etc.), as well.
They're actually a fairly normal dish in Asian countries, it's more of a delicacy out of Asia. Other cultures consider them a delicacy, I think mostly Europe. They can be eaten a variety of ways, though in my family, according to Viet culture. We eat them boiled, though you can't eat them raw too, but I really don't like raw foods. They're actually very nutritious, and fairly inexpensive.