The Collaborative International Dictionary of English v.0.48:

Vansire \Van"sire\, n. [The native name: cf. F. vansire.]
   (Zool.)
   An ichneumon (Herpestes galera) native of Southern Africa
   and Madagascar. It is reddish brown or dark brown, grizzled
   with white. Called also vondsira, and marsh ichneumon.
   [1913 Webster]