Why are ecologists concerned about the shift in date from May 28 in 1980 to May 15 in 2000 of the caterpillar peak mass?

Options
  • A. The caterpillars will eat much of the foliage of the trees where flycatchers nest, and their nests will be more open to predation.
  • B. The earlier hatching of caterpillars will compete with other insect larval forms on which the flycatchers also feed their young.
  • C. The flycatcher nestlings in 2000 will miss the peak mass of caterpillars and may not be as well fed.
  • D. The flycatchers will have to migrate sooner to match their brood-rearing season with the time of caterpillar peak mass.
  • Correct Answer: Option C