Animal Idioms

From "The Dictionary of Idioms and their Origins" by Linda and Roger Flavell:

-to give someone the bird
-the black sheep of the family
-cold enough to freeze the balls of a brass monkey
-no room to swing a cat
-dead as a dodo
-a lame duck
-an eager beaver
-to drink like a fish
-hold your horses
-knee-high to a grasshopper
-mad as a March hare
-pigs might fly
-raining cats and dogs
-to strain a gnat and swallow a camel
-an ugly duckling