common firecrest (Regulus ignicapilla), also known as the firecrest, is a very small passerine bird of the Regulidae family. Common firecrest in the forest. Regulus ignicapilla, Common firecrest, Regulidae,wild, european songbirds, european birds, common firecrest, ignicapillus, birdwatching, songbird, ignicapilla, ornithology, animal, wildlife, firecrest, bird