nikolaas tinbergen experiments

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1. Nikolaas Tinbergen

   

2. Nikolaas Tinbergen

   

3. Nikolaas Tinbergen

   

4. Nikolaas Tinbergen

   

5. Nikolaas “Niko” Tinbergen (1907-1988)

   

6. Nikolaas Tinbergen: The Father of Ethology