Illustrations of the Birds of California, Texas, Oregon, British and Russian America

"Illustrations of the Birds of California, Texas, Oregon, British and Russian America" by John Cassin is a scientific publication written during the mid-19th century. This work aims to provide comprehensive descriptions and illustrations of North American birds not previously documented by other American ornithologists, while also presenting a general overview of North American ornithology. It is expected to be a crucial reference for researchers and enthusiasts interested in the avian species of these regions. The opening of this volume introduces the author's motivations and the historical context for the study of North American ornithology, particularly highlighting the surge in scientific interest following the annexation of Texas and the integration of California and New Mexico into the United States. Cassin discusses advancements in natural history research facilitated by government expeditions and the establishment of collections and libraries dedicated to the study of birds and other wildlife. He also emphasizes the significance of the contributions made by various naturalists to expanding knowledge of bird species, setting the stage for the detailed illustrations and descriptions that will follow throughout the publication.