(DOWNLOAD) "Myology and Serology of the Avian Family Fringillidae" by William B. Stallcup * eBook PDF Kindle ePub Free

January 19, 2021

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.