Along the Napo River there are occasional high cliffs. One of these has the minerals and clays necessary to healthy parrots. Many of the fruits in their diet are poisonous and the clay helps neutralize the toxins harmlessly in their stomachs. Hundreds of parrots descent on these licks to nibble and scrape up the clay. In the photo below are hundreds of parrots of about 4-5 species wheeling about and jockeying for space.