POLYSPECIFIC ASSOCIATION OF 2 TAMARIN SPECIES, SAGUINUS-LABIATUS AND SAGUINUS-FUSCICOLLIS, IN BOLIVIA

A 5 month field study was conducted in the Pando Department of northern Bolivia, on two tamarin species: the red‐bellied tamarin, Saguinus l. labiatus, and the saddle‐back tamarin, S. fuscicollis weddelli. Data were collected both by observation and radio‐location on the group sizes, ranging behavior, daily activity patterns, and intergroup interactions. The two tamarin species formed stable mixed associations and each mixed species troop shared a common home range which they jointly defended against neighboring mixed species troops. Both species appeared to occupy a similar ecological niche, but differences were highlighted in their methods of insect foraging, their preferred height in the forest, and their mode of travel. Copyright © 1990 Wiley‐Liss, Inc., A Wiley Company