Vulture bees (or carrion bees) feed on rotting meat instead of pollen in order to make honey. They eat and store the flesh in a special stomach compartment and then return to the hive. There the meat is regurgitated and processed by a worker bee. – WTF Fun Facts
Source: SCIENCE WATCH; Carrion Bees – The New York Times (nytimes.com)
What does the honey taste like?