Starring a hummingbird chick

Most species lay their eggs in the water and go through a tadpole stage.

This past year, in 2009, you can see that they're now raising about a fourth of a chick, and some of these individuals are going more than 900 kilometers away from their nests.

In 1962, Gurdon s finding that almost any cell in the body contains the complete DNA code enabled him to create a tadpole by cloning an adult frog.

Well birds are pretty hard wired, as it happens, so most of that is already in their DNA, but to supplement it, part of Ben's idea is to use homing pigeons to help train the young passenger pigeons how to flock and how to find their way to their old nesting grounds and feeding grounds.