Duckbill Small 320×147 Medium 640×295 Large 1024×471 Download Tiff Original 2400×1105 | (2.5 MB) Description Duckbills are a primitive family of egg-laying, semi-aquatic mammals. Keywords duckbill, duckbill platypus, echidna, Mammalia, mammals, marsupials, monotremata, platypus Galleries Mammals: D-E Source: Buel P. Colton, Zoology: Descriptive and Practical (Boston:D.C. Heath & Co., 1903) 256
