Taxonomy is a scientific discipline that has provided the universal naming and classification
system of biodiversity for centuries and continues effectively to accommodate new …

Developments in several fields of study (including bio‐acoustics and the analysis of DNA)
together with reappraisals of the nature of species have impacted significantly on avian …

The taxonomic status of Carrion Corvus corone and Hooded Crows C. cornix is reviewed. As
well as the obvious differences in plumage between the two, there is good evidence for non…

Several cryptic avian species have been validated by recent integrative taxonomic efforts in
the Sino-Himalayan mountains, indicating that avian diversity in this global biodiversity …

The debate over species concepts has produced a huge body of literature on how species
can, may or should be delimited. By contrast, very few studies have documented how species …

The chats and flycatchers (Muscicapidae) represent an assemblage of 275 species in 48
genera. Defining natural groups within this assemblage has been challenging because of its …

… and Tundra Bean Goose, geographic variation in size (Johansen 1945; Delacour 1951;
Cramp & Simmons 1977; Roselaar 1977) is consistent with a clinal variation pattern (Sangster & …

The impact and significance of modern taxonomy on other fields in biology have been subjects
of much debate. It has been proposed that increasing numbers of vertebrate species are …

Species are the basic currency in biodiversity studies, but what constitutes a species has
long been controversial. Since the late 1990s, debates over species have shifted from …

Authentic DNA sequences are crucial for reliable evolutionary inference. Concerns about
the identification of DNA sequences have been voiced several times in the past but few …