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This four-volume catalogue, published 1848-54, provides an extensive list of the zoological and geological literature available at the time.

An authoritative review of the ecology of forest birds and their conservation issues throughout the Northern Hemisphere.

The average person can name more bird species than they think, but do we really know what a bird “species” is? This open access book takes up several fascinating aspects of bird life to elucidate this basic concept in biology. From genetic and physiological basics to the phenomena of bird song and bird migration, it analyzes various interactions of birds – with their environment and other birds. Lastly, it shows imminent threats to birds in the Anthropocene, the era of global human impact. Although it seemed to be easy to define bird species, the advent of modern methods has challenged species definition and led to a multidisciplinary approach to classifying birds. One outstanding new toolbox comes with the more and more reasonably priced acquisition of whole-genome sequences that allow causative analyses of how bird species diversify. Speciation has reached a final stage when daughter species are reproductively isolated, but this stage is not easily detectable from the phenotype we observe. Culturally transmitted traits such as bird song seem to speed up speciation processes, while another behavioral trait, migration, helps birds to find food resources, and also coincides with higher chances of reaching new, inhabitable areas. In general, distribution is a major key to understanding speciation in birds. Examples of ecological speciation can be found in birds, and the constant interaction of birds with their biotic environment also contributes to evolutionary changes. In the Anthropocene, birds are confronted with rapid changes that are highly threatening for some species. Climate change forces birds to move their ranges, but may also disrupt well-established interactions between climate, vegetation, and food sources. This book brings together various disciplines involved in observing bird species come into existence, modify, and vanish. It is a rich resource for bird enthusiasts who want to understand various processes at the cutting edge of current research in more detail. At the same time it offers students the opportunity to see primarily unconnected, but booming big-data approaches such as genomics and biogeography meet in a topic of broad interest. Lastly, the book enables conservationists to better understand the uncertainties surrounding “species” as entities of protection.

V.1-20 are, like missing vols. 21-26, also freely available online at the the China-America Digital Academic Library (CADAL), & can be accessed with the following individual urls: http://lookup.lib.hku.hk/lookup/bib/B3144507Xv1 Note: Click to view v.1 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv2 Note: Click to view v.2 via CADAL http://lookup.lib.hku.hk/lookup/bib/B3144507Xv3 Note: Click to view v.3 via CADAL http://lookup.lib.hku.hk/lookup/bib/B3144507Xv4 Note: Click to view v.4 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv5 Note: Click to view v.5 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv6 Note: Click to view v.6 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv7 Note: Click to view v.7 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv8 Note: Click to view v.8 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv9 Note: Click to view v.9 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv10 Note: Click to view v.10 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv11 Note: Click to view v.11 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv12 Note: Click to view v.12 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv13 Note: Click to view v.13 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv14 Note: Click to view v.14 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv15 Note: Click to view v.15 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv16 Note: Click to view v.16 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv17 Note: Click to view v.17 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv18 Note: Click to view v.18 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv19 Note: Click to view v.19 via CADAL. -- http://lookup.lib.hku.hk/lookup/bib/B3144507Xv20 Note: Click to view v.20 via CADAL.