Abstract

The works, views and ideas of Heini Hediger (1908-1992), one of the most distinguished and influential zoologist of the 20th century, had and still have an enormous impact on contemporary understanding of animal behaviour. His views on territorial, social, etc. aspects of animal behaviour are based on semiotic concepts derived from Umwelt-theory (J. v. Uexküll) and combined with ideas from modern ethology. Hediger's special attention was devoted to the area of animal-man communications; he treated these problematic phenomena as a system of semiosis-processes, in a mainly holistic way. Hediger's approach inspires the author to propose a notion "the need for impression" to be used in zoosemiotic analyses.