The Monsanto Insectarium is an insectarium located within the St. Louis Zoo, in St. Louis, Missouri. David Mason & Associates designed the $4 million, 9,000 square feet (840 m2) facility which opened in 2000. It houses educational exhibits and an active breeding and research facility. The research facility includes a window to the exhibits area and two-way communications so visitors may watch entomologists work and ask them questions. The facility also includes a geodesic flight dome cage, home to numerous rainforest flowers and butterfly species.
The Monsanto Insectarium is open every day except Christmas and New Years days. The insectarium opens at 9:00. Closing hour depends on the season. Admission to the zoo and the insectarium is free. The insectarium includes a tropical garden and pollinarium. The gallery (below) illustrates a few specimens from the pollinarium's collection.