any of several small falcons, esp the European Falco tinnunculus, that tend to hover against the wind and feed on small mammals on the ground
Word origin
C15: changed from Old French cresserele, from cressele rattle, from Vulgar Latin crepicella (unattested), from Latin crepitāre to crackle, from crepāre to rustle
kestrel in American English
(ˈkɛstrəl)
noun
1.
either of two small, reddish-gray European falcons (Falco tinnunculus or F. naumanni) that can hover in the air
2.
American kestrel
Word origin
ME castrel < OFr cresserelle, quercerelle: orig. echoic