Harriers are medium-sized birds of prey, usually with long, narrow wings and long, narrow tails when soaring. Most harriers have pointed wings and the males are grey; only the Marsh Harrier has rounded wings and mostly brown plumage.
Circus cyaneus – Busard Saint-Martin
The male Hen Harrier is pale grey and has black wing-tips. Differences from the Montagu's Harrier: larger; prominent white rump.
Found in coastal marshes (like the Camargue), dunes and open grassy plains.
Circus aeruginosus – Busard des roseaux
The Marsh Harrier is the largest of the harriers, with coloring and wing shape resembling the buzzard. Plumage of the male is mostly brown, with grey only along the back of the wings and the tail. It does have the black wing-tips like the other harriers. The female differs from all other harriers with its white head.
The harrier is common in all of the lowland areas of Beyond, and easily seen in the Camargue.
Circus pygargus – Busard cendré
This is the smallest of the harriers, and closely resembles the Hen Harrier in coloring. Differences from the Hen Harrier: clearly smaller; black bars near the trailing edge of the wings.
Less common in Provence. Usually in migration or during the summer.