Bulwer's and Jouanin's Petrels

Bulweria is a genus of seabirds in the family Procellariidae named after English naturalist James Bulwer. The genus has two extant species, Bulwer's petrel (B. bulwerii) and Jouanin's petrel (B. fallax). A third species, the Olson's petrel (Bulweria bifax), became extinct in the early 16th century; it is known only from skeletal remains. Bulwer's Petrel ranges in the Atlantic, Indian and Pacific Oceans, whereas Joaunin's Petrel is confined to the northwestern Indian Ocean. Olson's Petrel is...