An audio lecture on how a virus known as baculovirus infecting caterpillars changes their behavior which is advantageous to the spread of the virus. Learn that when the gypsy moth caterpillars become infected they climb for treetops. At the treetops the caterpillars die and the viral particles are scattered below onto other caterpillars. Lecture is by entomologist Kelli Hoover. [11:49]