. A history of British birds . than in the adult; thesecondary wing-coverts white with grey and black margins,forming an ill-defined bar ; tail nearly black, mottled withbrown ; line at the base of the bill pink, and not black, as inthe adult; feet dull pink. A nestling had the bill horn-black; upper parts darkbrownish-grey; under parts dirty-white ; feet clay-coloured. The tube of the windpipe is about twelve inches long,nearly cylindrical in form throughout; but, unlike those ofthe other Geese, the male has a hollow bony enlargement,half as thick as it is wide, at the bottom of the tube on t
. A history of British birds . than in the adult; thesecondary wing-coverts white with grey and black margins,forming an ill-defined bar ; tail nearly black, mottled withbrown ; line at the base of the bill pink, and not black, as inthe adult; feet dull pink. A nestling had the bill horn-black; upper parts darkbrownish-grey; under parts dirty-white ; feet clay-coloured. The tube of the windpipe is about twelve inches long,nearly cylindrical in form throughout; but, unlike those ofthe other Geese, the male has a hollow bony enlargement,half as thick as it is wide, at the bottom of the tube on theleft side, as shown in the vignette below, where the lowerportion of the windpipe, the bony enlargement, and the shortdepending bronchial tubes, the last slightly connected by athin slip of membrane, are figured of the natural size. Theview is taken with the tube and its enlargement in thenatural position, the breast-bone being removed, as in thecase of the view of the windpipe of the Spoonbill figured inthe present 304 ANSERES. ANATID^.
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Keywords: ., bookauthorsaun, bookcentury1800, bookdecade1870, booksubjectbirds
