Ornithology. a slim notch or other related opening between the guidelines of your primaries of certain birds, which in the course of flight aids to take care of a smooth stream of air over the wings.Setelah anda mengisinya anda bisa langsung mengkonfirmasikan nya kepada pihak Dwell chat agar pendaftaran anda diproses. Cukup dengan 1 ID saja anda su