Behrens, David


    • common teal
      Anas crecca
    • spot-billed duck
      Anas poecilorhyncha
    • gadwall
      Anas strepera
    • Asian openbill
      Anastomus oscitans
    • Asian openbill
      Anastomus oscitans
    • Asian openbill
      Anastomus oscitans
    • darter
      Anhinga melanogaster
    • darter
      Anhinga melanogaster
    • greylag goose
      Anser anser
    • greylag goose
      Anser anser
    • greylag goose
      Anser anser
    • greylag goose
      Anser anser
    • bar-headed goose
      Anser indicus
    • Oriental pied hornbill
      Anthracoceros albirostris
    • Oriental pied hornbill
      Anthracoceros albirostris