Attributes / relations provided by
♦ 1Wood Janka Hardness Scale/Chart J W Morlan's Unique Wood Gifts
♦ 2Wood Technology Transfer Fact Sheets U.S. Department of Agriculture - Forest Service
♦ 3PARROT CLAYLICKS: DISTRIBUTION, PATTERNS OF USE AND ECOLOGICAL CORRELATES FROM A PARROT ASSEMBLAGE IN SOUTHEASTERN PERU, ALAN TRISTRAM KENNETH LEE, dissertation for DOCTOR OF PHILOSOPHY, Manchester Metropolitan University, November 2010
♦ 4LILAC-CROWNED PARROT DIET AND FOOD RESOURCE AVAILABILITY: RESOURCE TRACKING BY A PARROT SEED PREDATOR, KATHERINE RENTON, The Condor 103:6269 (2001)
♦ 5del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 6Diet of the Scaly-headed Parrot (Pionus maximiliani) in a Semideciduous Forest in Southeastern Brazil, Mauro Galetti, BIOTROPICA 25(4): 419-425 1993
♦ 7Proyecto Tití