. Beginners' Zoology . the bottom of the foot; at the jointsof the toes .-* Explain. How does the covering of thenails and the bill compare in colour, texture, hardness,andfirmness of attachment with the scales of the leg? Draw an outline of the bird seen from the side. Makedrawings of the head and the feetmore detailed and on a largerscale. Why does a goose have morefeathers suitable for making pil-lows than has a fowl? In whatcountry did the domestic fowloriginate? (Encyclopaedia.) Whydoes a cock crow for dawn?(Consider animal life in jungle.) Activities of a Bird. — Observea bird eating. Do
. Beginners' Zoology . the bottom of the foot; at the jointsof the toes .-* Explain. How does the covering of thenails and the bill compare in colour, texture, hardness,andfirmness of attachment with the scales of the leg? Draw an outline of the bird seen from the side. Makedrawings of the head and the feetmore detailed and on a largerscale. Why does a goose have morefeathers suitable for making pil-lows than has a fowl? In whatcountry did the domestic fowloriginate? (Encyclopaedia.) Whydoes a cock crow for dawn?(Consider animal life in jungle.) Activities of a Bird. — Observea bird eating. Does it seem tochew or break its food beforeswallowing ? Does it have tolift its head in order to swallowfood ? To swallow drink ? Whyis there a difference ? After feed-ing the bird, can you feel thefood in the crop, or enlargementof the gullet at the base of theneck ? (Fig. 304.) Feel and look for any move- FiG. 301. — An Altrical Bird, poorly developed at hatch-ing. Young pigeon, naked,beak too weak for Fig. 302. —a Precocial Bird(well developed at hatching).Feathered, able to run and topick up food. Precocity is asign of instinctive life and lowintelligence. A baby is not pre-cocious. Question: Is pigeon or fowl ex-posed to more dangers in infancy f l62 BEGINNERS ZOOLOGY ments in brcatJiiiig. Can you find how often it breathesper minute ? Place hand under the birds wing. Whatdo you think of its temperature; or better, what tempera-ture is shown by a thermometer held under its wing ? Doyou see any connection between the breathing rate and thetemperature ? Test (as with the crayfish) whether a birdcan see behind its head? Notice the movements of thenictitating membrane. Does it appear to be transparent ? Watch a bird fly around a closed room and review thequestions on Control of Flight. Bend a birds leg and see if it has any effect upon itstoes. Notice a bird (especially a large fowl) walk, to seeif it bends its toes as the foot is lifted. Pull the reartepdon
Size: 1593px × 1568px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidbeginnerszoo, bookyear1922
