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← Nature & AnimalsWhich vocalization outcome occurs when bird brood parasites mimic parental alarm calls?
A)Enhanced offspring foraging efficiency
B)Delayed provisioning by true parents✓
C)Increased nestling growth rates
D)Improved predator detection ability
💡 Explanation
Delayed provisioning occurs because brood parasites exploit the pre-existing evolved antipredator vocalization strategy. Mimicry of the alarm call triggers parental avoidance of the nest, thereby temporarily halting provisioning, rather than allowing the other outcomes under ideal conditions.
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