One of the smallest of the warblers in the US, they are pretty uncommon in NC but sometimes in addition to migration we get an odd one overwintering.
This one was seen back in 2016 at Greenfield Lake and probably was still migrating. The females or young birds can be told from Yellow Warblers and Hooded Warblers by the well defined supercilium. Also, they are way more cute.
This other one found itself in the middle of a rare ice and snow event down my street in January 2018.