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The scientists conducted their
in a rainforest in Costa Rica. They installed
lights under the canopy and observed the creatures' flying
. Insects usually navigate by the
to fly in
lines. However, around the artificial lights, the bugs became
and made arcs and erratic patterns of flight. An entomologist said: "Natural
light…helps maintain proper
….Artificial sources…can produce continuous steering around the light and trap an insect." This explains why so many insects fly to their death into bug
. Artificial light adversely affects an insect's ability to find a mate, forage for food, and defend itself against
.