Morphologic and Morphometric Study of Lungs in Adult Indigenous Peafowl ‎‎(Pavo cristatus)

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Hanadi M AL-Araji
Hadaf H Mohammed


Peafowl are a species of bird for which there is limited scientific research, despite the importance of the respiratory system on bird health. This study aimed to provide a detailed anatomical examination and comparative description of the lungs in adult male and female indigenous peafowl (Pavo cristatus) to further our understanding of the respiratory system in this species. Sixteen healthy adult peafowl (8 peacocks and 8 peahens) were obtained from commercial markets in Dyalla, and  Baghdad, Iraq. The birds had a mean live weight of 3.5±0.59 kg for females and 3.0±0.39 kg for males. After being anesthetized, the birds were sacrificed by cutting off major blood vessels in the neck. Subsequently, the lungs were carefully dissected and examined to identify their shape, color, position, dimensions, and overall structure. Detailed photographs of the lungs were taken, and various measurements were recorded for each lung in male and female peafowl. The lungs of the peafowl were found to have an elongated, triangular shape, extending from the first to the sixth vertebral ribs. Each lung exhibited two borders (medial and lateral) and three surfaces (vertebral, costal or dorsal, and septal). Notably, the lateral border and dorsal surface of each lung had four deep grooves resulting from the embedding of the second to fifth ribs, which led to the division of the lung into five lobes in both peacocks and peahens. To the best of our knowledge, this study represents the first scientific research on the anatomical features of the lungs in indigenous peafowl. The findings from this study contribute to a better understanding of the lung structure in this bird species, which can be valuable for future studies on avian respiratory physiology and health.‎‎


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M AL-Araji, H., & H Mohammed, H. (2023). Morphologic and Morphometric Study of Lungs in Adult Indigenous Peafowl ‎‎(Pavo cristatus). The Iraqi Journal of Veterinary Medicine, 47(1), 74–79.


AL-Taai SAH. Microscopic and morphometric study in trachea and lungs of adult Iraqi pigeon (Columba ‎livia). Syst Rev Pharm. 2021;12(2):342-346.‎

Cathey JC, Melton K, Justin D, Cavney B, Locke SL, DeMaso SJ, et al. Life history physical characteristics. ‎In: Rio Grande wild Turkey in Texas: Biology and Management. Texas A&M inst Ren Nat Resour. ‎‎2008:4-6.‎

Pesek L. The avian respiratory system. Winged Wisdom Pet Bird Mag. 2000;1:1-3.‎

Suthers RA. Vocal mechanisms in birds and bats: a comparative view. Ann Braz Acad Sci. 2004;76(2):247-‎‎252.‎

Rastogi SC. Respiration. In: Essential of animal physiology. New Age Inter. (P) Ltd; 2007:263-285.‎

Schmidt ER. The avian respiratory system. West Vet Conf USA. 2013:1-15.‎

Reece WO. Avian respiratory system morphology. In: Function Anatomy and Physiology of Domestic Animals 3rd (ed.): Lippincott ‎Williams and Wilking; 2005. 230-268 p.‎

Maina JN. Structural and biomechanical properties of the exchange tissue of the avian lung. Anat Rec. ‎‎2015;298:1673–1688.‎

Lbe CS, Onyeanusi BI, Salami SO, Umosen AD, Maidawa SM. Studies of the major respiratory pathways of ‎the West african guinea fowl (Numida meleagris galeata): The Morphometric and Macroscopic ‎Aspects. Inter J Poul Sci. 2008;7(10):997-1000.‎

Baumel JJ, King AS, Breazile JE, Evans HE, Vandan Berge JC. Respiratory system. In: Hand book of Avian ‎Anatomy Nomina Anatomica Avium 2nd (Ed.). Club. Cambridge. Massachusetts; 1993:257-299p.‎

Sereno PC, Martinez RN, Wilson JA, Varricchio DJ, Alcober OA, Larsson HCE. Evidence for avian ‎intrathoracic air sacs in a new predatory dinosaur from Argentina. PLoS ONE. 2008;3(9):1-20.‎

McLelland J. Respiratory system. In: A Colour Atlas of Avian Anatomy. Wolfe Ltd; 1990. p. 95-119.‎

Frandson RD, Wilke WL, Fails AD. Poultry respiratory system. In: Anatomy and Physiology of farm ‎Animals. 7th ed. Wiley-Black Well; 2009. p. 471-474.‎

Mohammed FS, AL-Badri AMS. Histomorphological Structure of The Ultimobronchial Gland in the ‎Indigenous Geese Anser anser (Gray lage Goose). Iraqi J Vet Med. 2010;34(2):45–57.‎

Al-aameli MH, Kadhim KK. Morphological study of larynx and syrinx of black francolin (Francolinus ‎francolinus) in Iraq. Basrah J Vet Res. 2018;5(2):92-99.‎

Al-Saffar FJ, Al-Samawy ER. Histomorphological and histochemical study of stomach of domestic pigeon ‎‎(Columba livia domestica). Iraqi J Vet Med. 2016;40(1):89-96.‎

Schachner ER, Lyson TR, Dodson P. Evolution of the respiratory system in nonavian theropods: Evidence ‎from rib and vertebral morphology. Ana Rec. 2009;292:1501–1513.‎

Getty R. Aves respiratory system. In: Anatomy of domestic animals. W.S. Saunders Co; 1975. p. 1884-‎‎1917.‎

Demirkan AÇ, Kurtul I, Haziroglu RM. Gross morphological features of the lung and air sac in Japanese ‎Quail. J Vet Med Sci. 2006;68(9):909-913.‎‎