On the Brazilian side of the falls, the trails are mostly concrete (sidewalks) with wooden railings to prevent you from falling into the waters below. There are a few steps and some grade changes, but it is a nice leisurely stroll, unless you are part of a tour. Then they march you right along.
There were lots of birds along the trail, including this toco toucan. It didn't seem to shy around people either.
There were also quite a few butterflies in the area. Over 700 species have been identified in the park.
I also happened to catch this pair of mating grasshoppers "in the act".
But the real attraction was the falls.
Don't let their cuteness fool you. One man had a sack of apples and they ran up and ripped open his sack and attacked the apples. Then they chased him looking for more.