It includes zoologists, botanists, ornithologists, entomologists, malacologists, naturalists and other specialities. IPM combined entomologists, plant pathologists, nematologists and weed scientists. Conservationists, foresters, entomologists, and manufacturers of pesticides and fertilizers also participate in research here. It is held in exhibitions promoting entomology where the public and entomologists participate. The O. Orkin Insect Zoo features live insects and exhibits about insects and entomologists. The following is a list of entomologists, scientists who study insects. Moth traps are devices used by entomologists to capture moths. Maggots found on corpses are useful to forensic entomologists. The goal of many cotton entomologists was to eventually eradicate the pest from U.S. cotton. Contemporary specimens are used by forensic entomologists as medico-legal markers for the postmortem interval assessment. The biology of tsetse is relatively well understood by entomologists. There are also amateur entomologists and collectors who keep collections. Some entomologists consider only non-biting flies to be gnats. "L. sericata" is an important species to forensic entomologists. The breakdown of this process is essential to forensic entomologists.