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The National Geographic Guide to Birding in North America

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24 Epizód

The National Geographic Guide to Birding in North America - Season 1 Episode 9 9. epizód


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30 percek 2025 HD

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Plumage variation in a single bird reveals much useful information. First, take account of plumage differences based on sex, and seasonal plumage changes. Then investigate the remarkable range of age-related plumage variation in birds. Learn how birds molt (shed and replace plumage), and how hybrid species, as well as genetic and environmental factors, pose challenges for identification.

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