WordNet (r) 3.0 (2006):

stormy petrel
    n 1: sooty black petrel with white markings; of the northern
         Atlantic and Mediterranean [syn: stormy petrel, northern
         storm petrel, Hydrobates pelagicus]

Moby Thesaurus II by Grady Ward, 1.0:

116 Moby Thesaurus words for "stormy petrel":
   ancestor, angry clouds, announcer, antecedent, avant-garde,
   avifauna, baby bird, bellwether, bird, bird of Jove, bird of Juno,
   bird of Minerva, bird of night, bird of passage, bird of prey,
   birdie, birdlife, birdy, black cat, black clouds, broken mirror,
   buccinator, bushwhacker, cage bird, chick, cygnet, danger sign,
   diving bird, dove, eagle, eaglet, early symptom, explorer,
   falling barometer, fish-eating bird, fledgling, flightless bird,
   forebear, foregoer, forerunner, fowl, front runner, frontiersman,
   fruit-eating bird, fugleman, fulmar, game bird, gathering clouds,
   groundbreaker, guide, halcyon bird, harbinger, herald, high sign,
   innovator, insect-eating bird, lead runner, leader, messenger,
   migrant, migratory bird, nestling, omen, oscine bird, owl,
   passerine bird, pathfinder, peacock, peafowl, peahen,
   perching bird, pigeon, pioneer, point, precedent, precursor,
   predecessor, preliminary sign, premonitory sign,
   premonitory symptom, prodroma, prodrome, quarantine flag, rainbow,
   ratite, raven, red flag, red light, scout, sea bird,
   seed-eating bird, shooting star, shore bird, skull and crossbones,
   songbird, squab, storm clouds, storm petrel, swan, symptom,
   thundercloud, thunderhead, trailblazer, trailbreaker, vanguard,
   vaunt-courier, voortrekker, wading bird, warbler, warning sign,
   warning signal, water bird, waterfowl, wildfowl, yellow flag,
   yellow jack