Willow Grouse Sternum

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“Views of sternum and pectoral arch of the ptarmigan, Lagapus albus, reduced; viewed from below. a, sternum or breast-bone showing two long slender lateral processes; b, ends of sternal ribs; c, ends of humerous, or upper arm-bone, near the shoulder-joint; d, scapula, or shoulder-blade; e, coracoid; f, merry-thought, or furculum.” Elliot Coues, 1884


Bird Anatomy


Elliot Coues Key to North American Birds (Boston, MA: Estes and Lauriat, 1884)


TIFF (full resolution)

2400×1443, 251.3 KiB

Large GIF

1024×615, 50.8 KiB

Medium GIF

640×384, 28.2 KiB

Small GIF

320×192, 11.2 KiB