Johannes Abraham Bierens de Haan

Johan(nes) Abraham Bierens de Haan (March 17, 1883 – June 13, 1958) was a Dutch biologist and ethologist.

He was a founder of the study of animal psychology.

[1] He was born in Haarlem, and died in Siena, Italy.

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Bierens de Haan (centre, 1951)