Mohammad Reza Piryaei - Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Teimur Tabari - Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Seyed Mostafa Peighambari - Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Mehdi Vasfi Marandi - Department of Avian Diseases, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.
Nima Ghahremani - Department of Veterinary Medicine, Faculty of Agriculture, Islamic Azad University-Kermanshah Branch, Kermanshah, Iran.

Since the discovery of viruses, humans have always faced a great challenge in dealing with their subsequent diseases. Coronaviruses have created huge challenges in the world. Coronaviruses are RNA genome viruses from the Coronaviridae family that can cause different diseases in both poultry and humans, but no evidence has been provided for their zoonotic potential, which may be due to the different genera of the viruses that cause diseases in these hosts. There are different ways of transmission for the coronaviruses with airborne being the most common and important route. However, the role of migratory birds in their spread has been noticed recently. Due to the novelty and importance of this issue, we decided to conduct an analytic study on the role of migratory birds in the spread of coronaviruses. The results show that due to the high possibility of the virus mutations in the host's body, the interspecies barrier can be broken and we can see the direct transmission of the coronaviruses from birds to humans. However, due to the novelty of this topic, more studies are required to acquire a comprehensive knowledge on this matter.Since the discovery of viruses, humans have always faced a great challenge in dealing with their subsequent diseases. Coronaviruses have created huge challenges in the world. Coronaviruses are RNA genome viruses from the Coronaviridae family that can cause different diseases in both poultry and humans, but no evidence has been provided for their zoonotic potential, which may be due to the different genera of the viruses that cause diseases in these hosts. There are different ways of transmission for the coronaviruses with airborne being the most common and important route. However, the role of migratory birds in their spread has been noticed recently. Due to the novelty and importance of this issue, we decided to conduct an analytic study on the role of migratory birds in the spread of coronaviruses. The results show that due to the high possibility of the virus mutations in the host's body, the interspecies barrier can be broken and we can see the direct transmission of the coronaviruses from birds to humans. However, due to the novelty of this topic, more studies are required to acquire a comprehensive knowledge on this matter.

Coronavirus, Migratory Birds, Pathogenesis, Poultry, Virus