【Flit】 ,  【flutter】 ,  【flitter】 ,  【flicker】 ,  【hover】  suggest the movements of a bird or other flying or floating thing and mean to move in a manner like or reminiscent of such movements.

【Flit】 implies a light and swift passing from place to place or point to point.

【Flutter】 implies the movement of a bird rapidly beating its wings or the restless flitting of a moth about a light; it especially implies unsteadiness and agitation.

【Flitter】  implies the lightness and quickness of movement suggested by  【flit】  but usually also suggests the uneasiness or uncertainty connoted by  【flutter】 .

【Flicker】 implies a light fluttering or a fitfully wavering movement/

【Hover】 implies a hanging suspended over something like a bird maintaining its position in the air by an even usually slow movement of the wings; the word frequently connotes irresolution, sometimes menace, sometimes solicitude.