Female howler monkey on canopy bridge (IMAGE) Smithsonian National Zoological Park Caption Female howler monkey (Alouatta palliata palliata) uses a canopy bridge in Playa Hermosa, Costa Rica with an ingenious design to support prehensile tail use. Credit Ines Azofeifa Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.