The National Geographic Guide to Birding in North America Episode 9, Understanding Variations in Plumage Episode 9, Understanding Variations in Plumage.
Streaming video - 2017
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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[San Francisco, California, USA] :
The Great Courses
2017.
2019. - Language
- English
- Other Authors
- Online Access
- A Kanopy streaming video
Cover Image - Item Description
- Title from title frames.
Film
In Process Record. - Physical Description
- 1 online resource (streaming video file) (29 minutes): digital, .flv file, sound
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- Mode of access: World Wide Web.
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- AVAILABLE FOR USE ONLY BY IOWA CITY AND RESIDENTS OF THE CONTRACTING GOVERNMENTS OF JOHNSON COUNTY, UNIVERSITY HEIGHTS, HILLS, AND LONE TREE (IA).