Bhubaneswar: With the culling of over 16,000 poultry birds in the second day, the total birds culled during the two days in the 3km radius of the Central Poultry Development Organisation, Bhubaneswar, has been around 36,000. The culling operation was undertaken in 29 wards within the 3km radius of the CDPO farm after detection of the H5N1 virus and following the advisory from the agriculture ministry to prevent the spread of the avian influenza.