jenny wren

noun3

1. •
   (UK) The wren, Troglodytes troglodytes, especially as considered (in nursery-rhymes, etc.) as the wife or sweetheart of robin redbreast.

   • There would have been no one to superintend him, except a squirrel perhaps or a jenny wren, at which he might have winked. — 1955
2. •
   (Australia) a female blue wren, or a male blue wren in non-breeding plumage.

   • But Rogers had married beneath him, and the sight of the pursy upstart [...] sitting there, in satin and feathers, lording it over his own little Jenny Wren, was more than Mahony could tolerate. — 1917
3. •
   (US) Synonym of herb Robert.