A flamingo eats with its head upside down.
sloth
While most animals have a difficult time swallowing their food when they are held upside down, there is one animal that cannot swallow when held in this manner. This animal is a chicken.
A sloth is a three-toed animal that likes to hang upside down and moves very slowly.
A flamingo, they do this because of a filter in their mouths. this filter enables them to eat underwater without swallowing water. Its upside down though so they eat upside down
One of the animals that sleeps upside down is the opossum. There are over 40 different species of the opossum.
opossum
Guinea pigs
Monkeys and sloths can hang upside down in trees and they usually have grey or brown fur. Meerkats can also hang upside down in trees and have grey or brown fur.
Wild Animal Baby Explorers - 2010 Eggciting Eggs Upside Down 1-26 was released on: USA: 2011
A flamingo. It 'filter feeds' by pressing vegetable matter to the roof of it's mouth with its tongue. It does this with its head upside down.
It sounds like you mean a sloth. There are a few varieties and they generally do hang upside down on the underside of tree limbs.