The word "robin" is commonly used to refer to a specific type of bird, known as a robin, which is a large songbird. This answer is supported by the fact that the other two options do not accurately describe a robin. The second option suggests a repetitive action to become skilled, which is unrelated to the word "robin." The third option refers to something usually found between the nose and lips, which is not applicable to the word "robin." Therefore, the correct answer is "a large songbird."