lepidopterist:
(plural: ‘lepidopterists‘; pronunciation: for the right pronunciation of this word, please click here)
a specialist in lepidopterology;
a entomologist who collects and studies moths and butterflies,

a lapidopterist with some specimens of butterflies
My sister is a lapidopterist and never stops talking about butterflies and moths.
Lapidopterists, basing on survey of populations and migrations of butterflies, will analyse the ill-effects of the chemicals the farmers use in fertilisers and pesticides and help in controlling the environment pollution from the chemical usage in agricultural sector.
Lapidopterists and other entomologists work together to suggest improvements for the better survival of insects, especially butterflies and moths, which play an important role in the evolution and conservation of animal and plant life.
