Synonyms for Skylark (same or very similar meaning)
WordNet sense 1 (play boisterously):
cavort, disport, frisk, frolic, gambol, lark, rollick, romp, sport, lark aboutWordNet sense 2 (brown-speckled European lark noted for singing while hovering at a great height):
Alauda arvensisFrom the ODE community, based on WordNetadd/edit