. Animal biology; Human biology. Parts II & III of First course in biology. Biology. BIRDS 161. its lower surface; its upper surface. What effects are noticed ? Study the scales on the leg of a bird (Fig. 300). Why is the leg scaly rather than feathered from the ankle down- ward ? Which scales are largest? (Fig. 300.) How do the scales on the front and back differ ? What can you say of the scales at the bottom of the foot; at the joints of the toes ? Explain. How does the covering of the nails and bill compare in color, texture, hardness and firm- ness of attachment with the scales of the
. Animal biology; Human biology. Parts II & III of First course in biology. Biology. BIRDS 161. its lower surface; its upper surface. What effects are noticed ? Study the scales on the leg of a bird (Fig. 300). Why is the leg scaly rather than feathered from the ankle down- ward ? Which scales are largest? (Fig. 300.) How do the scales on the front and back differ ? What can you say of the scales at the bottom of the foot; at the joints of the toes ? Explain. How does the covering of the nails and bill compare in color, texture, hardness and firm- ness of attachment with the scales of the leg ? Draw an outline of the bird seen from the side. Make drawings of the head and feet more detailed and on a larger scale. Why does a goose have more feathers suitable for making pil- lows than a fowl ? In what country did the domestic fowl originate? (Encyclopedia.) Why does a cock crow for day ? (Consider animal life in jungle.) Activities of a Bird. — Observe a bird eating. Does it seem to chew or break its food before swallowing ? Does it have to lift its head in order to swallow food ? To swallow drink ? W7hy is there a difference ? After feed- ing the bird, can you feel the food in the crop, or enlargement of the gullet at the base of the neck ? (Fig. 304.) Feel and look for any move- M FIG. 301. — AN ALTRICAL BIRD, poorly developed at hatch- ing. Young pigeon, naked, beak too weak for Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bailey, L. H. (Liberty Hyde), 1858-1954. New York, The Macmillan Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbiology, bookyear1910
