He shared the 1973 Nobel Prize in Physiology or Medicine `` for discoveries in individual and social behavior patterns '' with two other important early ethologists , Nikolaas Tinbergen and Karl von Frisch .
Lorenz shared the 1973 Nobel Prize in Physiology or Medicine `` for discoveries in individual and social behavior patterns '' with two other important early ethologists , Niko Tinbergen and Karl von Frisch .