Hohoho! The first stamp on this "Wild" cover is from 2003 UPAEP issue, showing a Helmeted Iguana,a species of lizard found from southern Mexico to South America. It lives in rainforests. It has long limbs and climbs well. It feeds on insects, spiders, worms, and other lizards.
The second and the third stamp are from 1991 Rainforest Animals issue, with one showing a Common Iguana or Green Iguana,which is a large, arboreal herbivorous species of lizard of the genus Iguana native to Central and South America and the other one showing a jaguar,the only panthera species found in the Americas. The jaguar is the third-largest feline after the tiger and the lion, and the largest and most powerful feline in the Western Hemisphere.