In a manner relating to or according to the methods of herpetology.
From 'herpetological' (adjective) plus '-ly' (in the manner of). The '-ly' suffix transforms adjectives into adverbs expressing manner or method.
Adding '-ly' to adjectives creates adverbs that describe how something is done—'scientifically' (like a scientist), 'herpetologically' (like a herpetologist studies)!
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