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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Subjects
Genres
Education films
Published
[San Francisco, California, USA] : The Great Courses 2017.
2019.
Language
English
Other Authors
James Currie (actor)
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
Format
Mode of access: World Wide Web.
Access
AVAILABLE FOR USE ONLY BY IOWA CITY AND RESIDENTS OF THE CONTRACTING GOVERNMENTS OF JOHNSON COUNTY, UNIVERSITY HEIGHTS, HILLS, AND LONE TREE (IA).