지문 분석결과
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노트나 질문을 통해 자신만의 지문 노트를 만들어 관리해 보세요.
노트나 질문을 통해 자신만의 지문 노트를 만들어 관리해 보세요.
HELLO-BOOK
HELLO-BOOK
지문 전체 문장
문장을 클릭하면 해당 문장의 구문 분석 내용을 보여줍니다.
By caging warblers in a planetarium, they found that these birds can orient themselves according to the major star constellations. This is critical because conditions change and not all sources of orientation information are equally available at a given time, nor are all sources of information equally useful in a given situation. Using cues from various sources ensures they can navigate successfully under most conditions. Bird navigation studies have shown that birds rely on more than one source of information to guide them. Through this experiment, Keeton concluded that pigeons use the earth's magnetic field to navigate. His findings revealed the pigeons with the non-magnetic bars could navigate their way home much better than the group with magnets. He released two sets of pigeons at new locations-one group wore non-magnetic brass bars while the other wore tiny magnets. In the 1970s, Keeton undertook an experiment to determine if birds are able to orient themselves using the earth's magnetic field. When they turned off the stars, the birds became disorientated. They observed that the birds oriented north in the "spring" and south in the "fall" under simulated night skies. When seasons change, environments can become unlivable for some birds as food and water supplies dwindle. Many bird species navigate only after dark, and Franz and Eleanore Sauer were interested to see if these birds migrated using the stars as a kind of map. Also in the 1950s, another important discovery was made. When Kramer moved the starlings out of view of the sun, he found they did not face in any particular direction. The birds faced the direction in which they wanted to fly and continually adjusted their angle to the sun as the day went on, proving that their internal clock tells them where they should be at any given time of day. This theory was proven by Gustav Kramer in the 1950s when he placed starlings in cages, which were ready to migrate in view of the sun. Studies have shown that birds can determine directions based on the position of the sun because they have an "internal clock" mechanism which enables them to calculate where the sun is at certain times. When birds migrate, they use various kinds of environmental information to guide them. The most common pattern is for birds to breed in the northern hemisphere and then spend the non-breeding season in the southern hemisphere. Many species of birds adapt to these changes by migrating.
fico 문장 분석
지문에 사용된 특정 문장에 대한 궁금증은 해당 문장의 헬프fico쌤에 등록하는 것이 좋습니다.