. >> ricardo works with piotr naskrecki, a harvard professor.he's here in the park to document the diversity of its insects. >> what did you find, ricardo? i have some insects. >> in gorongosa, international scientists work with young locals to find out about mozambique's rich biological heritage. in recent weeks, ricardo has caught thousands of insects for the park's team of experts to identify. >> three types of insects. we have grasshoppers -- >> the gorongosa database is still a work in progress. it contains information on all the animals and plants found in the park, and that includes insects. they play a key role in the food chain. ricardo guta is studying agriculture. but his professor's enthusiasm is contagious, and now he'd like to study coleopterology in the u.s. >> another interesting thing about this group of grasshoppers -- first of all, they are always very colorful. >> after nightfall is when insects come into their own. professor naskrecki has set up a light trap, based on the principle that moonlight influences insect behaviour.