Red-footed Falcon
Falco vespertinus
It is a medium-small, long-winged species. The adult male is all blue-grey, except for his red undertail and legs; its underwings are uniformly grey. The female has a grey back and wings, orange head and underparts, and a white face with black eye stripe and moustaches. Young birds are brown above and buff below with dark streaks, and a face pattern like the female. Red-footed falcons are 28–34 cm (11–13 in) in length with a wingspan of 65–75 cm (26–30 in). The average mass is 155 g (5.5 oz).
ID text from Wikipedia, CC BY-SA 4.0

Rock Kestrel
Falco rupicolus
A slender, medium-sized kestrel, between 30 and 33 centimeters tall. Adult male kestrels weigh between 183g and 254g, while females weigh between 190g and 280g.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Red-footed Falcon and Rock Kestrel.