For more on the genetic control of beak shape in Darwin’s finches, see: Mallarino, R., P. R. Grant, et al. 2011. Two developmental modules establish 3D beak-shape variation in Darwin’s finches....

For more on the genetic control of beak shape in Darwin’s finches, see:

Mallarino, R., P. R. Grant, et al. 2011. Two developmental modules establish 3D beak-shape variation in Darwin’s finches. Proceedings of the National Academy of Sciences USA 108: 4057–4062.