Friendly Flies
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At least these two species of fly are real friends to man. The Hoverer Fly preys upon the pestiferous common black fly, while the Drone Fly, notwithstanding his name, helps materially to keep our gardens clean.
Source: Bell & Howell Filmosound Library Catalog of Educational Motion Pictures, 1942 · Record added 2026-09-26 21:16:36