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The world we perceive around an animal is its environment; what it sees is its Umwelt, or self-world. A specific environment contains many Umwelten, no two of which are the same. The concept, developed by Jakob von Uexküll in 1934, assumes that the structure of the organs of perception, the emphasis each receives, the level of their sensitivity, and the ability of each to discriminate, are different in all animals.
