. Adventures with animals and plants. Biology. Fic;. 23 A young owl. The owl 1mms at yilght. What do you notice about tl?e size of its pupils? How does this help the owl? (American mu- seum OF NATURAL HISTORY — OVERTON). Kic. 24 The American eagle. In which way is it fitted for obtaining food? (nature magazine — fisher) ll?c Living Things of the Earth unit i strong and attached far back enabling them to exert a powerful push against the water. The position of the legs makes it easy for them to tip their heads down for a dive. Their feet are large and webbed. Water birds all produce much oil wh
. Adventures with animals and plants. Biology. Fic;. 23 A young owl. The owl 1mms at yilght. What do you notice about tl?e size of its pupils? How does this help the owl? (American mu- seum OF NATURAL HISTORY — OVERTON). Kic. 24 The American eagle. In which way is it fitted for obtaining food? (nature magazine — fisher) ll?c Living Things of the Earth unit i strong and attached far back enabling them to exert a powerful push against the water. The position of the legs makes it easy for them to tip their heads down for a dive. Their feet are large and webbed. Water birds all produce much oil which protects their feathers from get- ting wet. This fact has given rise to the common expression, "as water rolls off a duck's ; Birds which cannot fly. A few species live wholly on land and never fly. The ostrich, the largest living bird, and its less familiar relatives have ^\'ings which are too small to be of any use. But all are good runners, running as fast as sixty miles an hour. When attacked and cornered, an ostrich defends itself by means of a kick which is dangerous to man. Perching birds. These, for the most part, are the birds that sing. You may kno\\' best the house (English) sparrows and the starlings of our crowded cities; the robins and the bluebirds of our suburbs; or the swallows and the crows of the countryside. These, and about four hundred fift\- other species, are perching birds. They are the birds to which man omcs much thanks for keep- ini^- down insect pests and for eating the seeds of weeds that would spoil crops and gardens. The songbirds often steal our fruit, but their bill of fare consists largely of insects or seeds of weeds that are harmful to man. Migration of birds. Many birds and some other animals migrate. They move from one place to another and back airain in tlie course of a year. The migrating season is generally the spring. Please note that these images are extracted from scanned page images that may have been digitall
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Keywords: ., bookcentury1900, bookpublisherbostondcheath, booksubjectbiology
