 With respect to the second contrast, most models of explanation assume that it is possible for a set of claims to be true, accurate, supported by evidence, and so on and yet unexplanatory. For example, all of the accounts of scientific explanation described below would agree that an account of the appearance of a particular species of bird of the sort found in a bird guidebook is, however accurate, not an explanation of anything of interest to biologists (such as the development, characteristic features, or behavior of that species). Instead, such an account is “merely descriptive”. However, different models of explanation provide different accounts of what the contrast between the explanatory and merely descriptive consists in.