The most common behavior after detecting a potential ground predator is "ya-ya" vocalization and branch breaking over the head of the potential predator, similar to the display of the brown woolly monkey.

The brown woolly monkey, common woolly monkey, or Humboldt's woolly monkey (Lagothrix lagotricha) is a woolly monkey from Colombia, Ecuador, Peru and Brazil.

The collared titi usually attempts to move out of the path of passing troops of brown woolly monkey or tufted capuchin, although sometimes the small monkeys give a burst of loud and aggressive-sounding vocalization ("bark") when they are approached closely by the larger species.

Oaska is a sub-species of woolly monkey known as the silvery woolly monkey(Lagothrix lagotricha poeppigii)

Woolly monkey (Humboldt's Woolly Monkey) (Lagothrix lagotricha)

The brown woolly monkey, common woolly monkey, or Humboldt's woolly monkey (Lagothrix lagotricha) is a woolly monkey from Colombia, Ecuador, Peru and Brazil.

Undescribed or unidentified species have been found on the hispid cotton rat (Sigmodon hispidus) in the southern United States, the marsh rice rat (Oryzomys palustris) in Florida, and Leontopithecus rosalia, Physalaemus soaresi, Cacajao calvus, and Lagothrix lagotricha in Brazil.