flutter

the motion made by flapping up and down

wink briefly

a disorderly outburst or tumult

move back and forth very rapidly

beat rapidly

move along rapidly and lightly; skim or dart

the act of moving back and forth

abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block

flap the wings rapidly or fly with flapping movements

“The seagulls fluttered overhead”