Odd question - (research paper)

Hello!! I’m not sure if this is a great place to post this but I figure you all could potentially point me to some resources I can use! I’m a senior in Highschool this year and for my dc biology class Ive started to plan my topic for my semester paper. The topic I’ve chosen hasn’t been written about much but I’d really love to look into it more - how natural selection evolved lateral displacement of the trachea and esophagus in birds - I think it is such an interesting trait birds have, im not asking to help me ‘write’ my paper but I would like to hear your opinions on the topic and potential resources you may know! I’ve found one paper on the topic so far [on the morphological description of the tracheal and esophageal displacement and its phylogenetic distribution in avialae (Jeremy j. Klingler)]