Taipei: National Taiwan University (NTU) researchers have identified an extinct Ice Age peacock species previously endemic to Taiwan, filling a long-standing gap in the island's bird fossil record. The study, published May 20 in the international journal Royal Society Open Science, was announced Friday on the school's website.

According to Focus Taiwan, the research's first author, Lan Yung-chieh, conducted the study under the supervision of Tsai Cheng-hsiu, an associate professor at NTU's Institute of Ecology and Evolutionary Biology, in collaboration with Gerald Mayr of the Senckenberg Research Institute in Germany. The findings are based on a well-preserved humerus fossil donated by fossil collector Hou Li-jen, NTU said.

Through detailed morphological analysis, the researchers concluded the fossil belonged to a previously unknown Taiwan-endemic bird species during the Pleistocene era (2.58 million-11,700 years ago), which they named "Pavo miejue", NTU said. The species, Pavo miejue, was larger than the bird featured on the NT$1,000 banknote, the Mikado pheasant, Taiwan's largest extant endemic bird.

The researchers said Pavo miejue, meaning "extinct peacock," is the first extinct Pleistocene bird species identified in Taiwan. They said the name was chosen to draw public attention to past extinction events. Pleistocene epoch bird fossils are rare in East Asia, limiting understanding of regional avian extinctions, according to the study's abstract.

The researchers said studying past extinction events could help inform understanding of the ongoing Holocene extinction, a term used to describe current species losses linked to human activity. The discovery extends the known range of the genus Pavo, which includes peafowl, into East Asia, according to the study.