Storm petrel

Storm petrel or stormy petrel may refer to one of two bird families, both in the order Procellariiformes, once treated as the same family.

From the base of the wave to the billow's crown, And amidst the flashing and feathery foam The stormy petrel finds a home,— A home, if such a place may be For her who lives on the wide, wide sea.

O’er the deep!—o'er the deep!

Where the whale and the shark and the sword-fish sleep,— Outflying the blast and the driving rain, The petrel telleth her tale—in vain!

The two families are:

European storm petrels of the family Hydrobatidae .
Wilson's storm petrel , of the family Oceanitidae .