Circus is a genus of birds in the family Accipitridae. The genus includes most harriers which are of the several species of diurnal hawks.

1/ Pallid Harrier (Diều Bụng trắng, Circus macrourus)
2/ Eastern marsh harrier (Diều đầu trắng, Circus spilonotus)
3/ Pied harrier (Diều mướp, Circus melanoleucos)