Martin M. Kowalewski, U. Illinois, Urbana, IL, Dissertation Fieldwork Grant, 2003, "Subgrouping Patterns and Cooperative Strategies in Howler Monkeys in Argentina"

This photograph was taken in Isla Brasilera, in the Chaco Province, in the North of Argentina. The researchers are taking data on a group of Howler monkeys. From left to right Romina Pave (field assistant), Nelson Novo (field assistant) and Martin Kowalewski (grantee and principal investigator). (September 2004)