If you are roadtripping in uruguay this is a very common sight. It's the house of a bird that goes by the name Hornero (Furnarius rufus). Builds his own place, about the size of a basketball ball and seems to have a thing for telegraph posts.
As a kid I used to think that it had a complex internal rooms distribution, with a tv room (electricity and telephone wire access is not the problem ;), and a bedroom, the whole bird family thing. Dumb kid. ...