Balut is a Filipino food that's more than an egg, but less than a duck. Or a chicken, as the case may be. In Saigon, I'd found, a half-hatched duck egg is called hot vit lon, and so despite my halting conversation with the proprietors of this stand, I'm unclear why they call it by its Filipino and not its Vietnamese name. In their eyes, I imagine, "balut" is the more transparent term; perhaps they've been watching the same globetrotting food shows as the rest of us.
In any case, this morning I didn't want to deal with the mess; my nosh was a salted, and cooked, duck egg (70 cents).
At the Old Oakland Farmers' Market, vicinity of 9th St. and Broadway, Oakland
(From an August 2011 visit)