In case you don't know, in British English, the little red-with-black-spots insect is not called a "ladybug", as in North America, but a "ladybird".
This seems rather a poor act of classification, all things considered. Does anyone know why the ladybird was given such a name? Was it purely whimsical, or is there any reason why this insect should seem more avian than the rest of its kin?
On a possibly related note, why was President Johnson's wife called Lady Bird Johnson? I guess Lady Bug Johnson might have been insufficiently dignified for the First Lady of the United States…
Best Answer
Etymonline says:
As to Lady Bird Johnson, that nickname was given to her by her nurse, as Wikipedia explains:
Responding to your comment, I will add that both of her parents were natives of Alabama and the nurse was an African American. The Corpus of Historical American Language has these stats for ladybird vs. ladybug:
(X axis: year, Y axis: incidences per million words.)