By Niko Tinbergen and The Editors of LIFE
Smooth scholars of animal habit, between whom Dr. Tinbergen is a pacesetter, have time and again proven that relatedness of other animal species is simply as definitely expressed via evaluating their habit styles as by way of evaluating their physique forms.
Being comparative, habit examine isn't really a box for the slender professional. Dr. Tinbergen's unusual paintings comprises research of the homing of wasps, the courtship of butterflies and the nesting habit of sea birds. His extensive adventure and deep insights are right here mixed in a desirable quantity which constitutes not just a problem yet an encouragement to each reader. someone, Dr. Tinbergen turns out to claim, 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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Example text
These little "eses" may number from less than 12 in some cave-dwelling insects to more than 28,000 in — the eye itself is smaller. It is also much less precise, not be- cause of any inability of the muscle-controlled lens to focus clearly, but because the receptors are fewer in number and proportionately bigger and thus produce a coarser mosaic. — many so-called of which may be said to be an eye in own lens and light-sensitive cells con- tiny units, each of itself, the dragonfly. Because of their tapered shape, they face outward in slightly different directions, and thus each takes in a different part of the scene.
Wide, At and For example, V inverted center its A 20 is it at its bottom only one square. the very covers only one squares again covers it horizontal projection of this comes out as a triangle (in color), one square wide at the its top, measured thick, vertically and thus is it Yet they are very sensitive to differences in sound intensity, the vertical projection is in color). The same projections are the I', and the to the octopus. \l; its those of two are indistinguishable However, ( the projections below) are and the octopus can tell elaborate and they song can be successfully imitated with sounds of any pitch within their range of i these sounds either begin or end abruptly.
As Harlow concluded, the experiments the need for establish the an infant's love and the attention and care of a mother. importance of bodily contact in CUDDLING UP t(i a cloth-. monkey clearly shows its prelercncc despite the fact that upbringing when a youngster i its own age is put in its it is the wire lor \\ rhesus armth and tomlort, dummy that gives it food. EASILY DOMINATED, the same monkey cannot defend itself or engage in play From these experiments Harlow learned that contact with other infants was vital to normal development.