American ornithologist
Bernd Heinrich, Ph.D (born 19 April 1940) is a professor in the zoology department at the University of Vermont. He has authored books about nature writing, zoology, ecology, and evolution. His father was the expert (1896–1984).
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I do not yet want to form a hypothesis to test, because as soon as you make a hypothesis, you become prejudiced. Your mind slides into a groove, and once it is in that groove, has difficulty noticing anything outside of it. During this time, my sense must be sharp; that is the main thing — to be sharp, yet open.