How do FID's Work?
Here I hope to show you some of the most wonderful things that Tiels can do. First I would like to show you how cockatiels fly. the video link here will give you a glimpse at how Tiels fly. I found it after a long search. Next is a picture of some tiels in flight (Credit to http://harvardmagazine.com/2002/01/hop-skip-and-soar.html).
Watching my kids fly here, along with research, I have learned much about how these creators fly at the speeds that they do.
The Digestive track is a complex. Illustrated here is a typical digestive track of a bird and a explanation of how food passes thru a birds system.
Reproductive organs and the process of egg development is shown in this article.