Swiftlets are unique birds that are known for their incredibly fast flight speeds, reaching up to 130-160 km/h. They are also one of the few birds that can sleep and mate while flying.Due to their nesting habits and lack of contact with other birds, swiftlets are the only poultry species that have never been infected with avian influenza.Swiftlets are highly sensitive birds that build their nests in dark places, often in caves or abandoned buildings. They are also very social birds and will