An endearing name for girl.
And by my word, your bonnie bird In danger shall not tarry; So, though the waves are raging white, I'll row you o'er the ferry.
Campbell: Lord Ullin's Daughter.
Bird is the Anglo-Saxon bird, the young of any animal, hence bride, verb, beran, to bring forth.
Ravens, by their acute sense of smell, discern the savour of dying bodies, and, under the hope of preying on them, light on chimney-tops or flutter about sick rooms; hence the raven indicates death. Owls screech when bad weather is at hand, and as foul weather often precedes sickness, so the owl is looked on as a funeral bird.
Minerva's bird is either the cock or the owl; that of Venus is the dove.
“The well-known bald-headed eagle, sometimes called the Bird of Washington.” —Wood.
The Arabian bird. The phoenix. The green bird tells everything a person wishes to know. (Cherry and Fairstar.) The talking bird spoke with a human voice, and could bid all other birds join in concert. (Arabian Nights.) Old birds are not to be caught with chaff. Experience teaches wisdom.
Early to bed and early to rise, Makes a man healthy, wealthy, and wise.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894