Kinglets are a small group of birds within Old World Warblers. They have their own family, Regulidae derived form Latin meaning prince because of the colored crowns they possess. They belong to the genus Regulus. The species are as follows:

Goldcrest Regulus regulus
Common Firecrest Regulus ignicapillus
Madeira Firecrest Regulus madeirensis
Taiwan Firecrest or Flamecrest Regulus goodfellowi
Golden-crowned Kinglet Regulus satrapa
Ruby-crowned Kinglet Regulus calendula