Attributes / relations provided by ♦ 1
Shaw, T. (1938) The avifauna of Tsingtao and neighbouring districts. Bull. Fan Mem. Inst. Biol. Zool. Ser. 8: 133–222 ♦ 2
Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at animaldiversity.org ♦ 3
Baillie, J.E.M. & Butcher, E. R. (2012) Priceless or Worthless? The world’s most threatened species.
Zoological Society of London, United Kingdom. ♦ 4
Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions
: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.