Definition of "swooping"

I rarely dared to write there after dark, but once in a while, gripped by the need to type a fresh version of a certain passage, I would type by candle or kerosene lamp and be treated to their [bats'] swoopings through the room.

2007, Annie Finch, On Her Poems and Her Life as a Poet

With a huge rush of wind a swooping eagle dropped from out of the night sky.

1988, Douglas Adams, The Long Dark Tea-Time of the Soul, William Heinemann Ltd, page 142