The hen harrier is long with a wingspan. It is best distinguished from the female hen harrier on structure. The hen harrier is the symbol of the AONB. The most similar are the hen harrier and the pallid harrier. Birds of prey found in the Flow Country include the buzzard and hen harrier. The term "hen harrier" refers to its former habit of preying on free-ranging fowl. The hen harrier ("Circus cyaneus") is a bird of prey. Eurasian hobby "Falco subbuteo", hen harrier "Circus cyaneus" and merlin "Falco columbarius". Hen harrier, sparrowhawk, buzzard, kestrel, merlin and peregrine falcon are all seen regularly. Other species seen regularly include hen harrier, common buzzard, cuckoo, merlin, green sandpiper and ruff.