Oxford: The Bodleian Library, 2014. Small octavo, publisher's boards, black and white illustrations. 'A murder of crows', 'a charm of goldfinches', 'an ostentation of peacocks': collective nouns for British birds have existed since at least the mid fifteenth century. They are thought to originate in texts about hunting, but have... More about A conspiracy of ravens: a compendium of collective nouns for birds

Greenwood: Roberts & Company, 2008. Quarto, paperback, colour illustrations. In 1990 Sibley and Monroe compiled a list of the world's birds. On that list were 9,672 species. In what has been something of a taxonomic revolution more have been added as vocalizations have been studied and DNA sequenced. Now there... More about Speciation in birds