GORAKHPUR, June 9 -- Migratory ducks were the primary source of the highly pathogenic avian influenza H5N1 (bird flu) outbreak at the Shaheed Ashfaqullah Khan Zoological Park in Gorakhpur recently, the CZA probe committee has disclosed in its report. The report also identified crows as key contributors to the spread of the virus, which led to the deaths of three big cats. The district authorities received the report on Saturday evening. Zoo director Vikas Yadav confirmed, "The investigation report, along with precautionary instructions, has been received." The zoo will now focus on protecting animals from migratory birds, enhancing biosafety measures, and conducting regular health screenings. P2...