. On the natural history and classification of birds . t us now see how the same structure isdeveloped, but under a totally different form, in agenus which belongs to the very same family. Weallude to the Mniotilta varia, Vieillot, or black andwhite creeper of Wilson : now this bird unquestionablybelongs to the warblers, and yet it runs up the trunk ofa tree almost with the same facility as a nuthatch; thehinder claw (b) is consequently much more lengthenedin proportion, than that of the titmouse, in order tosupport and keep the body in equilibrium, whereas thehind toe of the Parus is used for
. On the natural history and classification of birds . t us now see how the same structure isdeveloped, but under a totally different form, in agenus which belongs to the very same family. Weallude to the Mniotilta varia, Vieillot, or black andwhite creeper of Wilson : now this bird unquestionablybelongs to the warblers, and yet it runs up the trunk ofa tree almost with the same facility as a nuthatch; thehinder claw (b) is consequently much more lengthenedin proportion, than that of the titmouse, in order tosupport and keep the body in equilibrium, whereas thehind toe of the Parus is used for grasping, for thebird itself never climbs perpendicularly like the Mnio-tilta : it may, indeed, rather be said to hang thanclimb; and as greater strength of muscle is requisitefor the first than for the last of these positions, weconsequently perceive that the foot of the titmouseis much stronger than that of the Mniotilta, althoughthe latter bird makes the nearest approach to legitimateclimbing. (122.) Leaving these and similar representations of a.
Size: 1945px × 1285px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookidonnaturalh, booksubjectbirds, bookyear1836
