Attributes / relations provided by
♦ 1Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
♦ 2del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 3Jorrit 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.
♦ 4FORAGING ECOLOGY OF THREE SYMPATRIC TURACOS IN A MONTANE FOREST IN RWANDA, CHIN SUN AND TIMOTHY C. MOERMOND, The Auk 114(3):396-404, 1997