Monkeys and apes at the Budapest Zoo drink 55 liters of red wine each year, albeit in small quantities each day. This is said to help boost their red blood cells, according to the zoo.

Budapest Zoo spokesman Zoltan Hanga said it was the 11 anthropoid apes who drank most of the wine in 2005.

"Obviously, they do not have it all at once and get drunk, but they get it in small amounts mixed in their tea," Hanga said.

"And it's not Eger Bull's Blood or some expensive wine that they are getting but simple table wine, as it's mainly good for their blood cells."

Bull's Blood from the town of Eger in northeast Hungary became one of Eastern Europe's best-known wines under communism.