Many of the seeds and nuts found in the rainforest have toxins in them and animals come to clay licks to neutralize those toxins. This is a daily ritual for many birds in the Amazon.
Ecuador has two of the most accessible clay licks in the Amazon and both can be visited on the same day. The clay licks are in Yasuni National Park along the Napo River. Technically, the Napo Wildlife Center owns the land on which the clay licks are located but visitors from other lodges frequent them as well for an additional charge.
The first clay lick becomes active at around 7:00 in the morning on non-rainy days. It is located on the banks of the Napo River. Five different species of parrots frequent this clay lick including the Dusky-headed Parakeet, White-eyed Parakeet, Blue-headed Parrot, Yellow-crowned Amazon Parrot, and the Mealy Amazon Parrot.
The Napo Wildlife Center has two clay licks you can visit. The first is reached by boat and the 2nd is reached by a 1/2 hour hike through the jungle.