Bird Beaks

The resultant species must have a deep beak like the geospiza magnirostris because it must rip the bark from trees. The deep set beak will help the bird tear off the bark. Furthermore the bird will likely inherit the length of the geospitza conristris so that it may probe for insects. A sharp long beak will help it pick out the insect. Therefore, the beak will be deep set and long so that it may peel back the bark and pick at insects. I would expect the bird to express both Calmodulin and Bmp4 early on and at high amounts. An early and high expression of Calmodulin will lead to an elongated beak. Similarly, an early and high expression of Bmp4 will result in a deep set beak.