+A **Fixed Action Pattern** (FAP) is an instinctive, unchangeable behavioral sequence, species-specific and triggered by a particular [Sign Stimulus](/wiki/Sign_Stimulus). Once initiated, this [Behavior](/wiki/Behavior) runs to completion, often regardless of environmental shifts, representing a fundamental concept in [Ethology](/wiki/Ethology).
+## See also
+- [Instinct](/wiki/Instinct)
+- [Reflex](/wiki/Reflex)
+- [Releaser](/wiki/Releaser)
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