Genus Halocyptena

Least Storm-Petrel - The Least Storm-petrel is a small seabird of the storm-petrel family Hydrobatidae. It is 13-15 cm in length, with a wingspan of 32 cm. It is the smallest member of the order Procellariiformes. The species is the only member of the genus Halocyptena although it is sometimes included in the genus Oceanodroma.