Authors : Aysun Cevik-Demirkan and Vural Ozdemir
Abstract: In this study the structure of the larynx, trachea and syrinx of 7 eagle owls (3 females and 4 males) were morphologically examined by means of a steoro-microscope. Cone shaped papillae at each side of the mons laryngealis were observed. The caudal part (Mons laryngealis) in comparison to the cranial part was larger and possessed four transverse rows and two sagittal rows. Cartilaginous roof of the larynx was formed by the cricoid, procricoid and double arytenoid cartilages. The trachea passed to the left side of the esophagus at the 1/4 of the neck. The number of tracheal ring changed from 107-110 and all were complete. The sternotracheal muscle arised from the craniolateral process of the sternum and attached to the tracheal ring at the level of the 96th ring. The last 4-5 tracheal rings and the first 1-2 bronchial rings were involved in the formation of the syrinx. The first tracheal ring was complete whereas the dorsal and ventral ends of the last 3-4 tracheal rings were in a shape of open half moon. The pessulus was noted between ventral ends of the second tracheal ring. The tympanium was formed by the last 1-2 tracheal rings and the first bronchial ring. The number of bronchus from syrinx to the lung were observed being between 19 and 20.
Aysun Cevik-Demirkan and Vural Ozdemir, 2011. A Study on Anatomical Structures of the Larynx, Trachea and Syrinx in Eurasian Eagle Owl (Bubo bubo). Journal of Animal and Veterinary Advances, 10: 3218-3224.