ruby-crowned kinglet
| Noun | 1. |  ruby-crowned kinglet - American kinglet with a notable song and in the male a red crown patchSynonyms: Regulus calendula, ruby-crowned wren |
| Noun | 1. | ruby-crowned kinglet - American kinglet with a notable song and in the male a red crown patch Synonyms: Regulus calendula, ruby-crowned wren |