The taxonomy and relationships of the northern swans
The recent (1972) publication of the Wildfowl Trust's book The Swans has brought together an unprecedented array of information on all of the swans of the world, and makes it desirable to raise once again the question: how many species of northern swans are there, and what are their evolutionar...
| Main Author: | |
|---|---|
| Format: | Text |
| Language: | unknown |
| Published: |
DigitalCommons@University of Nebraska - Lincoln
1974
|
| Subjects: | |
| Online Access: | https://digitalcommons.unl.edu/johnsgard/11 https://digitalcommons.unl.edu/context/johnsgard/article/1011/viewcontent/WILDFOWL_1974_Taxonomy_northern_swans.pdf |