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I haven't been to Ecuador.

Other People's trip reports
Ecuador April 2004 - June 2005 : some comprehensive notes on mammal watching from Rich Lindie who spent 14 months working as a naturalist in the Sacha Lodge. He saw a lot of great stuff.

Northern Ecudador 2009: Steve Davis and Karen Becker, 2 weeks & 24 species including some great primates and a Tayra.

South America, 1996 (Bolivia, Peru and Ecuador). Steve Anyon-Smith, 6 weeks & a few mammals.