Tropical Horde
Thirty-two years ago, University of Pennsylvania biologist Daniel Janzen broke some ribs falling into a ravine in the Área de Conservación Guanacaste in northwestern Costa Rica. Sore and unable to leave his chair beneath a 25-watt light bulb deep in the forest, Janzen began to study the moths attracted to the dim light. What resulted was more than three decades of work collecting, photographing and raising caterpillars and then identifying each of the species, half of which had never been described before. The operation continues 365 days a year, with the help of 33 trained Costa Rican assistants.

Dr. Janzen and his caterpillars have been covered by the Penn Current, the New York Times and the Philadelphia Inquirer. He also has a website.
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