NYBC Taiwan is a citizen science project which aims to monitor the status and trends of wintering birds in Taiwan and its outlying islands. It was launched by the CWBF, the Wild Bird Society of Taipei (WBST), the Kaohsiung Wild Bird Society (KWBS) and ESRI in December 2013. The monitoring methods of NYBC Taiwan follow rules laid out in the more commonly known Christmas Bird Count. During the 23 days from mid-December to early January (with January 1st as the midpoint), volunteer teams choose a 24 hour period to count the birds within a circular sample area having a radius of three kilometers. Species, abundance, location, date, start time, end time, party size, survey method and weather are all recorded. Survey methods including line transect, counting flocks, area search and additional records are used. This data set provides valuable information about the distribution and community composition of Taiwan’s avifauna in winter. This data is distributed nationally to groups like Taiwan’s Ministry of the Interior and internationally where it contributes to Wetlands International’s International Waterbird Census.