Read e-book online Animal Behavior PDF

By Niko Tinbergen and The Editors of LIFE

Glossy scholars of animal habit, between whom Dr. Tinbergen is a pace-setter, have time and again proven that relatedness of alternative 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 really a box for the slim expert. Dr. Tinbergen's exceptional paintings comprises research of the homing of wasps, the courtship of butterflies and the nesting habit of sea birds. His vast 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 research animals and should conceivably make observations of lasting price to technological know-how. [From the creation]

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A simple test will show that the poppy reflects ultraviolet light which these insects see. VV'e will pick two poppies and flatten them out on a board in a field where poppies grow. One is covered with a filter which absorbs all visible light but admits ultraviolet. The other flower is covered with two filters one which absorbs all ultraviolet light plus a filter which absorbs all visible light. Both flowers pulse — — flect a great deal of blue as well, on the lahellum circuit. When was wired to an electric was placed in a this hair sugar solution, a minute electrical im- was produced, showing that tastes do register in the fly V nervous system.

Es, color blind and is we can initial is discriminate between grays. test for its ability to with a whole range of grays of varying shades. it grays rather than to the particular one assume can we then assume a chance that the animal is the animal to associate food with only one particular shade of gray, then present many There "faking" color vision by recognizing the color as a certain shade of gray. So we make a We train — almost. that its brightness discrimination response in the color we must make test is If was trained responds to it to, then not very accurate, and it was indeed a reaction to color alone.

When, late in became possible to fix such an image on the retina with chemicals and produce in at the moment the 19th Century, is its it only just beginning to be solved. made plored on the following pages for the first Some of the star- to date are depicted — and ex- in several instances time anywhere outside scientific journals. 51 t The Anatomy of Vision ONE: THE IMAGE ON THE RETINA It may never be possible to show exactly what any animal actually sees. But as the paintings on these and the following pages demonstrate, it is possible to show in a schematic way not only what the image falling on the rear wall may look like how the retina of the eye or retina animals but also this in various transforms image into visual information of use to the brain in initiating behavior.

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Animal Behavior by Niko Tinbergen and The Editors of LIFE


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