The Indian crested porcupine (Hystrix indica) (ICP) is widely distributed in Asia; however, compared with other rodents, little is known about the structures of its respiratory system. The aim of this study was to evaluate the histomorphology of the lower respiratory portion of the ICP to provide a basis for the identification of the normal How to cite this article: Marzban Abbasabadi B, Moradi HR, Arefi S, Kyllar M. Histomorphology of the lower respiratory tract in the Indian crested porcupine (Hystrix indica).