Freudians regard this as an erotic dream. Oneiro- critics give it a varied meaning according to the nature of the birds. Many small birds signify lawsuits; to catch birds with lime denotes unfair triumph over enemies; singing birds foretell joy and delight; to the poor a dream of birds implies many friends; to the rich it forecasts flight of fortune.
The dream of Uta, mother of Kremhild, who married Attila, the Hun, and sent for her kinsmen to avenge Siegfried’s death, is symbolic. “Stay here, good heroes,” she warns her children; “last night I dreamed an evil dream, that all the birds in the land were dead.” The treachery of the Huns justified the evil omen. In Christian symbolism a bird represents the soul; the bird of Paradise especially bears this significance.... The Fabric of Dream
A dream of heaviness, fear and trouble (Artemidorus). Thus Kremhild warns her lord Siegfried of his approachirig death. “Nay, Siegfried, I fear some mischance. Last night I dreamed an evil dream; how that two mountains fell on thee and I saw thee no more.
If thou goest thou wilt grieve me bitterly.” Nevertheless he rode off. She never saw him alive again Fall of the Niebelmgs.... The Fabric of Dream