Synonyms to halcyon bird

dark cloud, Black Magellanic Cloud, Crab Nebula, angry clouds, black cat, black clouds, bright diffuse nebula, broken mirror, coalsack, dark nebula, diffuse nebula, dust cloud, gaseous nebula, gathering clouds, nebula, nebula of Lyra, nebular hypothesis, nebulosity, nebulous stars, owl, planetary nebula, rainbow, raven, ring nebula, shooting star, storm clouds, stormy petrel, the Coalsack, thundercloud, thunderhead, blackening, blocking the light, breakers ahead, cardhouse, cause for alarm, clouding, crisis, danger, danger sign, dangerous ground, darkening, dimming, early symptom, eclipsing, emergency, endangerment, extinguishment, falling barometer, gaping chasm, hazard, high sign, house of cards, imperilment, jeopardy, menace, obfuscation, obnubilation, obscuration, obscurement, obumbration, occulting, omen, overcast, overclouding, overshading, overshadowing, overshadowment, pass, peril, pinch, plight, precursor, predicament, preliminary sign, premonitory sign, premonitory symptom, prod