Definition of sparrow hawks:
(n) :
The American kestrel or American sparrowhawk (Falco sparverius), a small falcon found in North and South America that preys on grasshoppers and small animals.
(n) :
Alternative form of sparrowhawk; the Eurasian sparrowhawk (Accipiter nisus), a small, short-winged European hawk and other similar Old World hawks in the subfamily Accipitrinae, that prey on smaller birds. [A Eurasian sparrowhawk, Accipiter nisus, a small, short-winged European hawk that preys on smaller birds.]