. The bird, its form and function . Fig. 324.—Tail of Pelican alighting. Fig. 325.—Tail of Tern in flight. the air, it can keep on only in a straight line and is atthe mercy of every cross-current of air. A more familiarcase, which any one may observe, is a Song Sparrow, orother small bird, which, from accident or from some irregu-larity of moult, has lost all or most of its of rismg with the strong, darting flight withwhich such a bird is accustomed to make its escape fromour path, its flight under such conditions is weak anddirect, like the trial efforts of a young bird
. The bird, its form and function . Fig. 324.—Tail of Pelican alighting. Fig. 325.—Tail of Tern in flight. the air, it can keep on only in a straight line and is atthe mercy of every cross-current of air. A more familiarcase, which any one may observe, is a Song Sparrow, orother small bird, which, from accident or from some irregu-larity of moult, has lost all or most of its of rismg with the strong, darting flight withwhich such a bird is accustomed to make its escape fromour path, its flight under such conditions is weak anddirect, like the trial efforts of a young bird. 410 The Bird Reserving the mention of partly ornamental tails untilthe last, we may now consider the use of this member asa prop or support to the bird as it clings to or makes itsway up vertical surfaces. Four groups of birds whichare thus distinguished are the woodhewers—a tropical
Size: 1578px × 1583px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1906
