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Légende :
Georg Kriszat, Fig. 21. Environment and Umwelt of the honey bee (1934)  
Illustration from Jakob Von Uexküll, « A stroll through the worlds of animals and men » [1934], in Schiller, Claire H. (ed). Instinctive Behaviour: The development of a modern concept, New York: International Universities Press, 1957, p. 41