The coin in one of the pictures is a Brazilian one real coin, about the size of an American quarter. This bug is dead and a little bit dirty, but it's the only one of these I've seen to get a picture.
There are some little insects using this flower.
Those trees were planted more than 10 years ago.
Cows avoid eating this plant and its fruits.
Mamangava. A bee with a very painful poison.
The legume has a lot of trichomes, like if it was covered in fur, and it's length usually is ~8 cm.
Produce milky secretion
Common name: Macaúba.
Probably Acrocomia acuelata.
A small spider.
Around 3mm long (without legs).
Long term study of Sapajus nigritus since 2001