TOEFL Listening: ETS-TOEFL听力机经 - 8PU4Z31L5W4Y99EXP$

What does the professor say about shorebirds' nesting habits? A. Shorebirds' nesting sites vary from year to year. B. Shorebirds' typically nest close to an area that has a variety of food sources. C. Shorebirds typically nest close together in group. D. Shorebirds are more territorial during nesting season than other seasons.