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Po luan në server:
- Episodi 1 Birding Basics: Bird Origins and Taxonomy
- Episodi 2 Basic Bird Anatomy
- Episodi 3 Size, Shape, and Color as Birding Tools
- Episodi 4 Bird Distribution, Status, and Endemism
- Episodi 5 Habitat and Season as Birding Tools
- Episodi 6 Introduction to Birding Optics
- Episodi 7 Tactics for Better Birding
- Episodi 8 Using Bird Behavior to Identify Birds
- Episodi 9 Understanding Variations in Plumage
- Episodi 10 Birding by Ear
- Episodi 11 Essentials of Bird Migrations
- Episodi 12 Birding at Night
- Episodi 13 Pelagic Birds
- Episodi 14 Waterbirds, Shorebirds, and Game Birds
- Episodi 15 Diurnal Raptors
- Episodi 16 From Doves to Kingfishers
- Episodi 17 Passerines: From Flycatchers to Thrushes
- Episodi 18 Passerines: From Thrashers to Warblers
- Episodi 19 Passerines: From Tanagers to Birders
- Episodi 20 Photography for Birders
- Episodi 21 Birding Sites in Eastern North America
- Episodi 22 Birding Sites in Western North America
- Episodi 23 Birds and People
- Episodi 24 Birding Ethics and Conservation
0 Pikëpamjet
The National Geographic Guide to Birding in North America - Season 1 Episode 9 Understanding Variations in Plumage
0 Pikëpamjet
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.
Zhanri: Documentary
Cast: James Currie
Ekuipazhi: James Currie (Writer)
Vendi: United States of America
Studio: Wonderium, The Great Courses
Koha e ekzekutimit: 30:14 minuta
Cilësia: HD
Data e parë e ajrit: May 26, 2017
Data e fundit e ajrit: May 26, 2017
Episodi: 24 Episodi
Sezoni: 1 Sezoni
IMDb: 10
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