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♦ ¹PARROT 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
♦ ²LILAC-CROWNED PARROT DIET AND FOOD RESOURCE AVAILABILITY: RESOURCE TRACKING BY A PARROT SEED PREDATOR, KATHERINE RENTON, The Condor 103:62–69 (2001)