Deciding which species to conserve is hard enough, but deciding how many of a species is a viable goal is an entirely different matter (Image Credit: Frank Wouters, CC BY 2.0, Image Cropped)
When talking about species conservation, my concern is always around how many individuals should there be in a population of species. What should be our numeric goal in re-establishing a species? Should the endangered anoa become as many as their domestic relative, the water buffalo, of which there are at least 3 million individuals in Indonesia? How about the songbirds? Should each species be as abundant as the chicken?