Darwin’s beetle (Chiasognathus grantii) is a Chilean beetle of the Lucanidae (stag) family. When it was collected by Charles Darwin on his Beagle voyages, he noted that the fearsome mandibles were “not so strong as to produce pain to finger”. Instead, these huge structures, only found in males, are used for wrestling over females. Due to their arboreal lifestyle these wrestles often result in the loser being thrown from great heights, back to the bottom of the tree.

Darwin’s beetle (Chiasognathus grantii) is a Chilean beetle of the Lucanidae (stag) family. When it was collected by Charles Darwin on his Beagle voyages, he noted that the fearsome mandibles were “not so strong as to produce pain to finger”. Instead, these huge structures, only found in males, are used for wrestling over females. Due to their arboreal lifestyle these wrestles often result in the loser being thrown from great heights, back to the bottom of the tree.

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    Happy Darwin Day!
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    Darwin’s beetle (Chiasognathus grantii) is a Chilean beetle of the Lucanidae (stag) family. When it was collected by...
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