Article Summary: A fixed activity pattern (FAP) is one instinctive behavioral solution triggered by a very specific stimulus. When triggered, the FAP habits can’t be quit ‘midstream’, but must play out to completion. Yawning is one example. 
FAPs are developed by a neural network well-known as the innate release mechanism. The FAP is triggered in an answer to an outside sensory stimulus recognized in pet behavior terms together a sign stimulus, or, if the is a signal indigenous one individual to another, that is referred to as a releaser.

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Niko Tinbergen, a pioneering researcher of pet behavior, learned the egg rolling behavior of the Greylag Goose as an instance of one FAP. If among the gooses' egg rolls away from the nest, the goose immediately rolls the egg earlier to the nest with a repeated, details action. When the female notices an egg external the swarm (sign stimulus), she begins this repeated motion to traction the egg v her beak and also neck.
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Sometimes both birds perform the dance together, yet in countless cases, that is one ornately feathered masculine dancing for the female. In this case, the key stimulus because that this FAP is the visibility of the female, and she chooses she mate based on how sophisticated his plumage and how fine he deserve to boogie down.
If, when the goose is rojo the egg earlier to the nest, the egg slides turn off to the side, or is eliminated by one observer, the goose continues to repeat the stereotypic movements, till she reaches the nest. She'll climate relocate the lacking egg and also begin the process all end again.

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Mating dances are one more FAP example. Plenty of varieties of birds engage in this kind of courtship behavior, which often consists of a specific sequence of elaborate movements. 
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