Monkeys that will be eaten by birds
Pygmy marmosets, mainly distributed in South America, live mostly in the upper reaches of the Amazon River.
Adult pygmy marmosets are only about 13 centimeters tall and weigh between 140 and 160 grams, which is the size of a finger in an adult human.
Many insects living in primary forests are much larger than adult pygmy marmosets, not to mention pygmy marmoset cubs, whose cubs are about 3 centimeters, equivalent to half a small middle finger. Because of their diminutive size, many birds mistake them for insects and prey on them.