All experimental and animal care procedures complied with the current laws of Puerto Rico and the United States. The IACUC of the University of Puerto Rico, Medical Sciences Campus approved this investigation (Protocol # 6810103). This study was supported by a grant awarded to M.S. Gerald by The Leakey Foundation and under NIH, NCRR grant CM-20-P40RR003640-13 awarded to the Caribbean Primate Research Center, and awards from the University of Puerto Rico-Medical Sciences Campus. We thank Dr. Janis Gonzalez, Dr. Mario Rodriguez, Dr. Edmundo Kraiselburd, and the caretaking staff of the Sabana Seca Field Station, particularly Milton Martínez, whose logistical support allowed us to complete our experiments successfully. We also thank Dr. Anthony Little and Professor David Perrett for generously providing access to the necessary technical equipment and expertise.