Notes on American and Old World English Sparrows
نویسندگان
چکیده
منابع مشابه
Co-evolution of plumage characteristics and winter sociality in New and Old World sparrows.
Understanding the evolution of phenotypic diversity, including the stunning array of avian plumage characters, is a central goal of evolutionary biology. Here, we applied a comparative analysis to test factors associated with the origin and maintenance of black chest and throat patches, which in some taxa are referred to as 'badges-of-status'. Specifically, we tested whether the evolution of bl...
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متن کاملAmerican English File Series Evaluation Based on Littlejohn’s Evaluative Framework
Textbooks play a pivotal role in language learning classrooms. The problem is, among a wide range of textbooks available, which one is more appropriate for a specific classroom and a group of learners. In order to evaluate ELT textbooks, theorists and writers have offered different kinds of evaluative frameworks based on a number of principles and criteria. This study evaluates one example of s...
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ژورنال
عنوان ژورنال: The Auk
سال: 1915
ISSN: 0004-8038,1938-4254
DOI: 10.2307/4071613