== Sentence case species common names policy == 

 Wikipedia has adopted a policy, in common with most if not all other encyclopedias, as well as the majority of other works in formal prose, of using sentence case for common names of species of mammals (as well as for species of most other types), since such names are not proper nouns; this policy is given here.  According to this rule, the term "ucucha", a Quechua mammal common name, should be given in sentence case, since it is a common noun.  

 It should be noted that sentence case typography rules are not necessarily applied to lists, titles, or other printing that is not part of prose sentences. Thus, the typography used in the MSW3 common name listing (which is always given in title case) cannot be taken as evidence that the authors of the book would use the same typography in prose. Furthermore, even if MSW3 were to use a title case common name in prose, that would have no relevance here, since the Wikipedia policy is based on the distinction between proper and common nouns, regardless of the typography used by MSW3 or any other source.