Lady Bird,Lady Bug (larvae)

"In the USA, the name ladybird was popularly americanized to ladybug, although these insects are beetles (Coleoptera), not bugs (Hemiptera).
Now, the word ladybird applies to a whole family of beetles, Coccinellidae or ladybirds, not just Coccinella septempunctata. We can but hope that newspaper writers will desist from generalizing them all as "the ladybird" and thus deluding the public into believing that there is only one species. There are many species of ladybirds, just as there are of birds, and the word "variety" (frequently use by newspaper writers) is not an appropriate substitute for the word "species." Many ladybird species are considered beneficial to humans because they eat phytophagous insects ("pests of plants", sometimes called "plant pests"), but not all eat pests of plants, and a few are themselves pests."