The Taiwan blue magpie[2] (Urocissa caerulea), also called the Taiwan magpie, Formosan blue magpie (Chinese: 臺灣藍鵲; pinyin: Táiwān lán què), or the "long-tailed mountain lady" (Chinese: 長尾山娘; pinyin: Chángwěi shānniáng; Taiwanese Hokkien: Tn̂g-boé soaⁿ-niû), is a bird species in the crow family.

The Taiwan blue magpie was collected by Robert Swinhoe and described by John Gould.

[3] Swinhoe translated the magpie's Hokkien name into English, calling it the "Long-tailed Mountain-Nymph".

[9] Similar to other members of the crow family, they have a raucous call which is described as a high-pitched cackling chatter, kyak-kyak-kyak-kyak.

Their diet includes snakes, rodents, small insects, carrion, eggs and chicks of other birds, plants, fruits, and seeds.

The Taiwan blue magpie has helpers at the nest, mostly juveniles from previous breeding seasons.

Taiwan blue magpies have a strong nest defence behaviour, and will attack intruders until they leave.

The sacred bird is called Teofsi'za in Tsou, Fitfit in Thao, and Haipis (Isbukun group) / Kaipis in Bunun.

In the common great flood myths of Taiwan Austronesian peoples, in Tsou, Thao, and Bunun sagas, the last surviving peoples escaped from the great flood to high mountain summits as the last refuge.

[12][18] Taiwan blue magpies are sometimes illegally captured by humans, but the number of cases of this seems to have decreased.

[20] The Taiwan blue magpie defeated the Mikado pheasant, but the vote was not formally accepted.

In 2017 China Airlines unveiled a Taiwan blue magpie paint scheme on an Airbus A350.

In 2007, three hybrid chicks were found in a nest in Taichung, with red-billed and Taiwan magpie parents tending them.

However, the Endemic Species Research Institute of Taiwan has been working to control red-billed magpie populations by capturing individual birds and relocating their nests.