The Falls are not the only attraction in the parks. The surrounding subtropical forest – a dense, lush jungle – is packed with animals, birds and insects, and opportunities for spotting at least some of them are good. Even on the busy catwalks and paths that skirt the edges of the Falls you’ve a good chance of seeing gorgeously hued, bright blue butterflies as big as your hand (just one of over 250 varieties that live around the Falls) and – especially on the Brazilian side – you will undoubtedly be pestered for food by greedy coatis (a raccoon relative). For a real close-up encounter with the parks’ varied wildlife, though, head for the superb Sendero Macuco, a tranquil nature trail that winds through the forest on the Argentine side. Commonly spotted species along here include various species of toucan and shy capuchin monkeys.