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CHAPTER 4 III The Wing: Particulars of Flight 49

A

B

C

Figure 4-9 • A, A great horned owl, its wings and contour feathers spread, as seen from above side; (B), above, wing and tail feathers

closed; (C) above, wing and tail feathers open; (D) above, first digit deployed; (E) above, close-up, first digit deployed; (F) below, fi rst digit
deployed; and (G) front. H, The owl on its back, its contour feathers extending caudally nearly to its talons. I, With its contour feathers
spread laterally, exposing its down or insulating feathers.
Continued

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