This is my dissertation, accepted by Bielefeld University in 2010. I worked on optic flow in behavior and brain function of the zebra finch with Hans-Joachim Bischof. Chapters 3 and 4 had been published prior to graduation, chapter 5 was submitted for publication at the time. However, this exact version of the manuscript did not make it into a journal. However, the data in parts were published later and I strongly suggest to also read the according research article. All chapters include additional information not found in the journal articles. All publishers involved reserve the authors the right to self-archive their publications at least in different form. Please visit my Publication List.