What is "crested lark"

n. A small, non-migratory lark found throughout most of temperate Eurasia (''http://en.wikipedia.org/wiki/Galerida%20cristata'').

The crested lark (Galerida cristata) is a species of lark distinguished from the other 81 species of lark by the crest of feathers that rise up in territorial or courtship displays and when singing. Common to mainland Europe, the birds can also be found in northern Africa and in parts of western Asia and China. It is a non-migratory bird, but can occasionally be found as a vagrant in Great Britain.