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Also, here are some commercial RF-licensed images that match your search criteria:  
Chafer Stock Photos
Author: Tiptopua
May-bug Royalty Free Stock Images
Author: Vtorous
Beetle Stock Image
Author: Maksudkr
Stag beetle Stock Image
Author: Sosha

Explore more commercial options: More Chitin Stock Illustrations & Vectors | More Chitin Stock Video Footage