Part of the Primate Field Studies series. The Spectral Tariershares the results of long-term field study by Sharon L. Gursky with a broad audience.Chapter 1: Taxonomic History Chapter 2: Field Site and Data Collection Methods Chapter 3: Ecological and Social Factors Selecting for Gregariousness: Chapter 4: Ecological and Social Factors Selecting for Gregariousness Chapter 5: Infant Care and the Cost of Infant Transport Chapter 6: The Cost of Nonmaternal Caretakers: Paternal and Subadult Infant Care Chapter 7: Conservation Status of Spectral Tarsiers Chapter 8: Summary and ConclusionsSharon L. Gursky is Biological Anthropology Program Coordinator and Professor of Anthropology at Texas A&M University, USA. She is currently studying ultrasonic vocalizations in Philippine tarsiers, Tarsius syrichta. Upcoming research will focus on elucidating the function of the ultrasonic vocalization for this species.