Zoos are typically public attractions that do not explicitly, or through a more implicit culture, expect quietness from their guests. This paper will explore whether quietness is something we should aim for when we are visiting zoos. Primarily through analogy with other public spaces which share some of the key characteristics of zoos (libraries and schools, cinemas, theatres and galleries, war memorials, and hospitals and gardens), we suggest that quiet is indeed appropriate in zoos (more appropriate than being noisy). A (...) major component of this argument will be the exploration of what is meant by quiet (and noise), and outlining a concept of quietness based on an idea of attention. The central premise here, drawing upon theories of attention and love, is that noise involves a certain kind of outward expression, which leaves less room for the appreciation of, and attention to, the animals and information that the zoo provides. The article will reflect on how a call for quiet may create scope for enhancing the educational possibilities of zoos, and how zoos might profit by taking the acoustic dimension of visitor behaviour into account when considering their values. (shrink)