Brownie points in modern usage are a hypothetical social currency, which can be acquired by doing good deeds or earning favor in the eyes of another, often one’s superior. In New Zealand slang, the expression also carries the derisory connotation of having accomplished something petty or otherwise unimportant.
Adult crane flies do not eat at all; most adult crane flies only mate and then die. Crane fly larvae are called leatherjackets or ‘leatherjacket slugs’ because of the way they move and eat roots (such as those of grass in lawns) and other vegetation. Leatherjackets can sometimes cause damage to plants.