RIO DE JANEIRO, BRAZIL - The Cagarras Islands are a well-known landmark for beachgoers in Rio de Janeiro. These six islands are located just 5 kilometers offshore and are clearly visible from Ipanema beach.
What few people know is that these islands provide important habitats for various animals, both on the islands themselves and in the waters around them.
One of the clearest marks of this is the white stains on the rocks from calcium-rich fish-fed bird droppings (guano) which can be seen from kilometers away.
Now scientists monitoring the area have learned that the islands also host . . .