Answer
We should look at the rates of current amphibian extinction and past extinction for amphibians (fossil record and historical record).
Work Step by Step
Past rates of extinction provide a baseline for understanding current rates.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.