Name:

Medium Ground Finches (Geospiza fortis)

  1. In 1973, __________   _____________ started going to an isolated island called Daphne Major in the ________________________.
  2. He camped with Rosemary Grant and their daughters Nicola and Thalia.
  3. They marked and measured every _________________ on the island, for ___________ years !
  4. They followed individual _________________ and their _________________ from nestlings to death.
  5. Made many measurements including the ______________   of the   ____________ .
  6. During the wet years ( _____   ____________ ) many small _________________ are produced on the island.
  7. The finch _________________ tended to have smaller _________________ that were more efficient eating smaller _________________ .
  8. During ______   ___________ -related droughts all the small _________________ are eaten and the birds are forced to eat _________________ hard seeds.
  9. As many as _________________ of the _________________ _________________ !
  10. The next year the _________________ tend to have _________________ bills. Why?
  11. The _________________ -billed _________________ have greater feeding _________________ and so live to raise _________________ .
  12. Why don't the _________________ tend to get _________________ and _________________ bills?
  13. During _________________ years the _________________ -billed birds are more successful.
  14. This is a _________________ selection of the _________________ .
  15. What is the _________________ between _________________ or _________________ ?
  16. A _________________ in _________________   _________________ of _________________ mm !