The Katydids Escaped! (IMAGE) Smithsonian Tropical Research Institute Caption For every mammal species in the tropics there are about 300 insect species. Researchers often know very little about the role insects play in the tropical forest. Sharon Martinson works in Hannah ter Hofstede's lab at Dartmouth University to understand katydid communication. Here, she shares her katydids with visitors to the Smithsonian Tropical Research Institute's lab in Gamboa, Panama. Credit Jorge Aleman Usage Restrictions For use with this release. License Licensed 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.