Do you know these expressions ? That´s a list of animal idioms.
From Wikipedia, the free encyclopedia
"An idiom (Latin: idioma, "special property", f. Greek: ἰδίωμα – idiōma, "special feature, special phrasing",
f. Greek: ἴδιος – idios, "one’s own") is an expression consisting of a combination of words that has a figurative
meaning. The figurative meaning is comprehended in regard to a common use of the expression that is separate
from the literal meaning or definition of the words of which it is made.
Idioms are numerous and they occur frequently in all languages.
There are estimated to be at least 25,000 idiomatic expressions in the English language."
For learn more: http://www.eslcafe.com/idioms/id-mngs.html