Let me start this new thread with the undermentioned quotation: "Strategic collection planning is a relatively new concept for zoos. Until recently, personal preference, availability, and competition determined which species or subspecies were acquired. In the last few years, however, there have been attempts to employ systematic criteria for taxon selection that better serve conservation objectives. Planning currently occurs at three levels: global, regional, and institutional. The current planning process is reviewed and recommendations are made for ways the process might be improved. An efficient, economical, and effective collection planning process is critical if modern, professionally managed zoological institutions are to make a significant impact on wildlife and ecosystem conservation. Rather than selecting taxa solely on the possibility of a future reintroduction, serious consideration should be given to the ability of a species or subspecies to contribute to more immediate conservation goals, including public education, fund raising to support field conservation, and scientific research. Because resources are limited, perhaps zoos should focus their long-term breeding programs primarily on flagship species—that is, those that have the potential to excite public attention and help to protect habitat and other taxa—rather than on a broad array of species that are currently endangered. " Strategic collection planning: Theory and practice, written by Dr. Michael Hutchins, Kevin Willis and Robert J. Wiesemm, Zoo Biology, Volume 14, Issue 1, pages 5-25, 1995 Firstly you can find an interesting article about the differences and similarities between North American and European zoo collections here: ZOOmoments - America vs. Europe
