By Niko Tinbergen and The Editors of LIFE
Glossy scholars of animal habit, between whom Dr. Tinbergen is a pacesetter, have many times proven that relatedness of other animal species is simply as absolutely expressed by means of evaluating their habit styles as via evaluating their physique forms.
Being comparative, habit examine isn't a box for the slender professional. Dr. Tinbergen's distinctive paintings comprises research of the homing of wasps, the courtship of butterflies and the nesting habit of sea birds. His large adventure and deep insights are right here mixed in a desirable quantity which constitutes not just a problem yet an encouragement to each reader. somebody, Dr. Tinbergen turns out to assert, with a pointy eye and ear, a degree of persistence and a fit skepticism approximately leaping to conclusions, can profitably examine animals and will conceivably make observations of lasting worth to technological know-how. [From the creation]
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Thought is if it Once it fails to is estab- lished that the fish can hear, one can proceed to explore systematically exactly its hearing organ can achieve tween different animal fails to Any levels of pitch or —how accurately how weak it what can distinguish be- the sound can be made before the react. response which an animal makes naturally — such as coming for food can be used as an indicator of behavior. However, these natural responses are not always convenient to work with and not always as clear-cut as an investigator would like.
Once it was realized that animals might have sense organs quite different from our own, became imperative to explore their sensitivity to outside and thoroughly. This is a laborious task, but, like all is extremely fascinating and rewarding. And the first step in to find out exactly just what it is in a given situation that an it stimuli systematically exploration, it such a study animal is is responding KARL VON to. Frisch, the famous Austrian zoologist, gave this field of research its initial impetus.
When faced with an intruder such as a mechanical teddy bear, the monkeys fled to the cloth mother, rubbed against her and then, comforted and unafraid, examined the bear. Similarly, when the monkeys were put in a strange room, they immediately sought out the cloth mother and clung to two to artificial ''mothers,'" wooden face her for solace before exploring. Baby monkeys reared without their real mothers or the terry cloth substitutes proved to be incapable of normal relationships with either males or females.