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Overview: This video illustrates the speciation process in birds to help explain the basis of earth's biodiversity. Registration may be required to view the discussion and multiple choice questions that accompany the video. Author/Source: TED-ed Grade level: 9-12 Time: 15 minutes Concepts: Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details. Biological evolution accounts for diversity over long periods of time. (LS4.A, LS4.D) Speciation is the splitting of one ancestral lineage into two or more descendent lineages. Speciation requires reproductive isolation. Speciation is often the result of geographic isolation. Teacher background: Speciation

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