What type of figure of speech is not one can spit a sparrow off a treeor knows a horse cold from a minie ball?

The phrases "not one can spit a sparrow off a tree" and "knows a horse cold from a minie ball" are examples of idiomatic expressions. They convey specific meanings or cultural references that may not be immediately clear from the Words themselves. These figures of speech often reflect regional vernacular and can illustrate a character's background or the setting of a narrative.