'''キクイタダキ'''（菊戴、学名''Regulus regulus''）は菊を戴く'''』という意味から命名された。

体長10センチぐらい、体重3~5gの小型の鳥で、日本国内では最小の鳥である(世界最小はハチドリの一種)。小さい為、カマキリなどに捕食されることもある。

鳴き声は「ツツツツティーツィツィ」。

== Sibley分類体系上の位置 ==

{{Sibley
|Aves
|スズメ目 Passeriformes
|スズメ亜目 Passeri
|スズメ小目 Passerida
|ウグイス上科 Sylvioidea
|キクイタダキ科 Regulidae
}}
== 人間との関係 ==
ヨーロッパの伝説や民間伝承において、本種はしばしば鳥の王とされる。学名の属名および種小名の ''Regulus'' もラテン語で「小さな王」という意味である。その理由は頭頂部の黄色い冠羽があたかも王冠を冠っているようだから、とされたりもするが、キリスト教布教以前の民間信仰により、古くから「鳥の王」とされてきたのはミソサザイであり、キリスト教布教によりいつしかその辺が曖昧になって混同されたのが実際の理由のようである。

{{Taxobox
| name = Goldcrest
| status = LC
| image = Regulus regulus0.jpg
| image_width = 240px
| regnum = Animalia
| phylum = Chordata
| classis = Aves
| ordo = Passeriformes
| familia =  Regulidae
| genus = ''Regulus''
| species = '''''R. regulus'''''
| binomial = ''Regulus regulus''
| binomial_authority = (Linnaeus, 1758)
}}

The '''Goldcrest''', ''Regulus regulus'', is a very small migratory and northern birds coniferous woodlands, although it has a wider range in winter, when it is often found with tit flocks. It builds an open nest and lays 4-12 eggs.

The Goldcrest is the smallest European bird, measuring from 8.5 to 9.5cm and weighing as little as 5g. It is dull greenish above, with buff/white underparts, two white wingbars, and a plain face with a conspicuous black eye. The crown has black sides and a narrow black front, and a bright central crest, orange in the male and yellow in the female, which is displayed during breeding. It is a restless species, constantly on the move as it searches for insects.

Goldcrests on the Canary Islands have a broader black band across the forehead, and yellower wingbars. They belong to separate subspecies. They are sometimes considered a separate species, but usually are included in the Goldcrest. Recently, it has been established that there are in fact two distant Canary Islands populations: the Tenerife Goldcrest (''R. (r.) teneriffae'') and the Western Canary Islands Goldcrest (''R. (r.) ellenthalerae'') (Päckert ''et al.'', 2006).

The Goldcrest is the national bird of Luxembourg. In Britain, Goldcrests were previously called Gold-crested Wrens, and are celebrated in a poem by Charles Tennyson Turner with that title.

==References==
*  Database entry includes justification for why this species is of least concern
* Päckert, Martin; Dietzen, Christian; Martens, Jochen; Wink, Michael & Kvist, Laura: Radiation of Atlantic goldcrests ''Regulus regulus'' spp.: evidence of a new taxon from the Canary Islands. ''Journal of Avian Biology'' '''37'''(4): 364-380. Digital Object Identifier: 10.1111/j.2006.0908-8857.03533.x [http://dx.doi.org/10.1111/j.2006.0908-8857.03533.x HTML abstract] [http://www.oikos.ekol.lu.se/appendixdown/JAB3533.pdf Electronic Appendices]