Images Videos Foraging is an example of an instinct driven by impulses serving specific biological functions. Charles Darwin, c. 1867. Sigmund Freud, c. 1910. Konrad Lorenz being followed by greylag geese (Anser anser), 1960. Nikolaas Tinbergen. Male three-spined stickleback fish (Gasterosteus aculeatus) display instinctive territorial defense behaviour against trespassing males, who may be rivals for reproductive mates. Honeybees demonstrate instinctive behaviours that require minimal involvement of experience or environmental input. Mandrill (Mandrillus sphinx). Mating behaviour in animals is instinctive. The courtship displays of animals such as the male frigate bird (Fregata minor) are driven by instinct. Migration of birds and other animals is based on instinctive behaviour. Like most animals, insects function predominantly on instinct. Author Jonah Lehrer discussing at the Commonwealth Club of California in San Francisco the role of the prefrontal cortex in instinctual choice and rational decision making, February 2009. Click here to view the video at Fora.tv.