托福口语 Task 3

In biology, the concept of 'behavioral adaptation' refers to an action or series of actions an organism performs to survive and reproduce in its environment. Unlike physical adaptations, which involve body structures, behavioral adaptations are learned or instinctive responses that enhance an organism's chances of survival. These behaviors can include migration, hunting strategies, or social interactions that help an animal find food, avoid predators, or cope with changing seasons. Behavioral adaptations are often shaped by natural selection, meaning that beneficial behaviors become more common in a population over time.

Professor: So, let me give you a clear example of behavioral adaptation. Consider the Arctic tern, a seabird that migrates every year from the Arctic to the Antarctic and back—a round trip of about 70,000 kilometers. This migration is not a physical feature; it's a behavior. The terns follow the summer sunlight, which allows them to feed on fish and insects in rich polar waters during both northern and southern summers. By doing this, they avoid the harsh winter conditions and ensure a continuous food supply. This behavior is instinctive, not taught, and it has evolved because terns that migrate in this pattern survive and reproduce more successfully than those that might stay in one place. So, the Arctic tern's migration is a perfect example of a behavioral adaptation that directly increases its chances of survival.