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Authors: Pablito Aguiar, Raimunda Tutanguira and Jonathan Watts
Scientific consultants: Júlio César Bicca-Marques, a primatologist specializing in howler monkeys, and Paulo Moutinho, senior scientist at the Amazon Environmental Research Institute
Spell check (Portuguese): Elvira Gago
Translation into Spanish: Meritxell Almarza
English translation: Sarah J. Johnson
Page setup: Érica Saboya