Explains the development of which system is associated with more complex behavior of birds in comparison

Explains the development of which system is associated with more complex behavior of birds in comparison with fish, amphibians and reptiles.

Birds are considered a more progressive and developed group for the reason that their brains have received further development and are significantly different from the form that their predecessors had with a lower structure. The following distinctive features are available:

A fundamental change and progress in the development of the optic hillock in the midbrain.
The large size of such a department as the cerebellum. He monitors coordination and is responsible for the consistency of movements. This is advisable and necessary in connection with the way of life of the birds.
The hemispheres of the anterior region are much larger, which distinguishes birds with the complexity of their behavior.