In creatures ranging from birds to fish to wildebeest, we observe the collective and coherent motion of large numbers of organisms, known as 'flocking.' John Toner, one of the founders of the field of active matter, uses the hydrodynamic theory of flocking to explain why a crowd of people can all walk, but not point, in the same direction. Assuming a basic undergraduate-level understanding of statistical mechanics, the text introduces readers to dry active matter and describes the current status of this rapidly developing field. Through the application of powerful techniques from theoretical condensed matter physics, such as hydrodynamic theories, the gradient expansion, and the renormalization group, readers are given the knowledge and tools to explore and understand this exciting field of research. This book will be valuable to graduate students and researchers in physics, mathematics, and biology with an interest in the hydrodynamic theory of flocking.

Chuang Tzu's first three chapters are arranged into free verse (in Chinese, in the original word order) and translated, nearly word-for-word, with extensive critical glosses vis-a-vis over fifty Chinese, Japanese, and Western commentators. The exegetical, philosophical, and contemporary implications of these chapters are then meditated upon. Here, in Chuang Tzu's world, all strivings are a play, parodying stories and arguments; each plays off of and refers to the others. Chuang Tzu lived during the third and fourth centuries B.C. Historically, he is the foremost spokesman for Taoism and its legendary founder, Lao Tzu. It was mainly due to the influence of Chuang Tzu that Indian Buddhism was transformed in China into Ch'an into the unique vehicle we usually call by its Japanese name, Zen. This is the most thorough presentation to date of the Chuang Tzu's poetic beauty, philosophical insights, and unity.

Includes material on phalaropes, snipes, woodcocks, sandpipers, godwits, willets, oyster catchers, tattlers, plovers, curlews, and others.