Herring gulls feed their chicks by regurgitating food for the chick in the nest. When a chick pecks at the red spot on the gull's beak, the parent regurgitates the food. Interestingly, the chicks will peck at any red spot, whether it is attached to a gull or not. Which features of this behavior are correctly labeled? (Check three.)
A. Key stimulus -- the red spot
B. Innate releasing mechanism -- the red spot
C. Key stimulus -- the shape of the parent's beak
D. Key stimulus -- the regurgitated food
E. Fixed action pattern -- pecking at the spot
F. Fixed action pattern -- finding a healthy variety of food for the chick
G. Innate releasing mechanism -- neural circuit that induces pecking in response to a red spot
Answer: G
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