It is understood as an "outside diet", and depending on the context it may be that a predator hunts to eat outside his usual territory (p. and. a mosquito that prefers to bite outside of homes, outdoors), or that its diet is alien to natural food for the individual (p. and. when an animal species becomes extinct and its natural predator must look for another way to feed itself), or even when it occurs outside its social group (p. and. among anthropophages who only eat members of other tribes or families). It is formed by the Greek prefix 949; 958; 969; ( exo "out, external" ) 966; 945; 947; 949; 953; 957; ( fagein , "eat" ) .