Red-footed Falcons differ significantly in appearance between females and males.
While the male (4th & 5th photo) is a rich dark blue-gray, the female (1st, 2nd & 3rd photo) is primarily rust-brown with blue-gray feathers.
Immature birds have a streaked breast.

Red-footed Falcons breed in Eastern Europe and Central Asia, and winter in Southern Africa.
Like Common Kestrels, they regularly hover in the air to locate prey.

Vadu area, Constanta County, Romania, 20 May 2018