Pachyptila is a genus from the family Procellariidae and the Procellariiformes order. The members of this genus and the Blue Petrel form a sub-group called Prions. Etymology Pachyptila, the word, comes from the Greek words pakhus and ptilon. Pakhus means thick or stout and ptilon means a feather. Also from the Greek language, Prion comes from the word priōn meaning a saw, which is in reference to its serrated edges of its bill.Gotch, A. T. (1995) Taxonomy All the members of this genus, alo… (More on Pachyptila)