The case of the dirty bird

When Dunc Culpepper and his best friend, Amos, first see the parrot in a pet store, they're not impressed -- it's smelly, scruffy, and missing half its feather. They're only slightly impressed when they learn that the parrot speaks four languages, has outlived ten of its owners, and is probably 150 years old. But then this dirty bird starts talking about buried treasure ...