Alfred Edmund Brehm,
Cassell's book of birds; vol. 4
“ The flight of the Spoonbill is beautifully light, and often performed in circles, or the bird assumes a hovering motion, and flies with neck stretched directly forward, making rapid strokes with its wings; the voice is quaking, and only audible at a short distance. In disposition these birds are usually timid and cautious, but if not molested soon acquire confidence. With their own kind they live in the utmost harmony, and are constantly to be seen billing and arranging each other's feathers, with every demonstration of sympathy and affection. ”
