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WikiPedia: Xylotrupes_ulysses http://www.ento.csiro.au/aicn/system/c_1040.htm http://www.qm.qld.gov.au/inquiry/factsheets/rhino_... http://zipcodezoo.com/Animals/X/Xylotrupes_ulysses... https://web.archive.org/web/20090515095835/http://...