partridge in a pear tree
The likelihood of finding a partridge in a pear tree is slim, and not just because partridges aren't big fruit eaters. Partridges are ground-nesting birds, preferring to avoid soaring journeys and high perches.
The word ultimately comes to us from perdix, the Greek word for the bird. This word is thought to be based on a verb meaning "to break wind" ... apparently referring to the sound of the bird’s wings as it flies off.