lark

(noun) North American songbirds having a yellow breast. Synonyms: meadowlark.

(noun) a songbird that lives mainly on the ground in open country; has streaky brown plumage. Synonyms: pipit, titlark.

(noun) any of numerous predominantly Old World birds noted for their singing.

(noun) any carefree episode. Synonyms: escapade.

(verb) play boisterously. Synonyms: frolic, rollick, skylark, disport, sport, cavort, gambol, frisk, romp, run around, lark about. Examples: "The children frolicked in the garden." "The gamboling lambs in the meadows." "The toddlers romped in the playroom."