A new cover from Brazil, courtesy of Flavio. The stamp on the cover pictures the Neotropical Otter, a.k.a. Neotropical River Otter (Lontra longicaudis).
Inside the envelope I found a WWF maxicard for my WWF collection. The card is from the 1984 issue on Muriquis (Brachyteles arachnoides). Thank you Flavio!