1 Staġun
24 Episodju
The National Geographic Guide to Birding in North America - Season 1 Episode 9
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.
- Sena: 2017
- Pajjiż: United States of America
- Ġeneru: Documentary
- Studio: Wonderium, The Great Courses
- Kelma ewlenija: natural history, birding, educational, guide, science
- Direttur: James Currie
- Kast: James Currie