The New Encyclopaedia Britannica
Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries - 934 pages
 Propaedia: outline of knowledge and guide to the Britannica.--- Micropaedia: ready reference and index.--- Macropaedia: knowledge in depth.
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(B.G.S./L.B.Sm.) Behaviour, Animal Animal behaviour (ethology) includes any
activity of an intact organism. A living animal behaves constantly in order to
survive, and all animals must solve the same basic problems. They must, for
Such searching, or appetitive, behaviour is often highly variable. The true nature
of a particular appetitive behaviour can, as a rule, be ascertained only as the act
progresses. The drive that motivates a robin to search a lawn, for example, ...
The courtship behaviour of male hybrids, paired with female hybrids of this same
cross, is intermediate between that of the two parental-species males. When the
hybrid males are paired with parental-species females, their courtship behaviour
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review