 The abstract summarizes the key point of the article, including the fact that highly pathogenic avian influenza, HPAI, H5 viruses are still a major threat to the poultry industry and an emerging threat to humans. It also highlights the importance of understanding the risk factors associated with the spread of these viruses, such as the role of waterfall as a reservoir and the seasonality of outbreaks. Additionally, it discusses the identification of new strains of H5N1 and H3N8 viruses circulating in Bangladeshi poultry and wildlife populations. This article was authored by Arafor Islam, Sherifor Islam, Mergedes Flora and others.