Swallow Small 320×308 Medium 640×617 Large 1024×987 Download Tiff Original 2491×2400 | (2.8 MB) Description Two swallows perched on a thick branch. Keywords bill, birdy, puffbird Galleries Birds: S Source: William & Robert Chambers Encyclopaedia - A Dictionary of Universal Knowledge for the People (Philadelphia, PA: J. B. Lippincott & Co., 1881)