Objectives: Ascaridia spp. has been found to be a common parasite of various birds in most parts of the world. Infections with Ascaridia spp. may cause reductions in growth rate, weight loss and damage to the intestinal mucosa. The lifecycle of Ascaridia spp. is direct and infection takes place by ingestion of the infective eggs with food or water. The eggs hatch in the intestine of the host and the larvae reach maturity in six to eight weeks in the intestinal mucosa with no out- migration of intestinal tract when they are swallowed by the birds. Materials & Methods: A 23 year-old common Myna (Acridotheres tristis) was presented for autopsy to Veterinary Teaching Hospital, School of Veterinary Medicine, Ferdowsi University of Mashhad. The history presented by the owner revealed that the bird was caged alone; its diet consisted of commercial chicken layer’s pellets, fruits and vegetables. There was not any history of any diseases before that owner found her dead in the floor of its cage in the morning. Results & Conclusion: Necropsy was done and revealed no gross pathological changes in visceral organs but in abdomen cavity we found few larvae of Ascaridia spp. that characterized by the presence of three large lips and the oesophagus has no posterior bulb. Due to the lack of access to adult worm in the intestinal tract of this Myna, we could not identify species of this parasite.

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