[Download] "Myology and Serology of the Avian Family Fringillidae" by William B. Stallcup # eBook PDF Kindle ePub Free
eBook details
- Title: Myology and Serology of the Avian Family Fringillidae
- Author : William B. Stallcup
- Release Date : January 19, 2010
- Genre: Life Sciences,Books,Science & Nature,
- Pages : * pages
- Size : 377 KB
Description
The relationships of many groups of birds within the Order Passeriformes are poorly understood. Most ornithologists agree that some of the passerine families of current classifications are artificial groups. These artificial groupings are the result of early work which gave chief attention to readily adaptive external structures. The size and shape of the bill, for example, have been over-emphasized in the past as taxonomic characters. It is now recognized that the bill is a highly adaptive structure and that it frequently shows convergence and parallelism.