The advertisement calls of the new species from Huanglian Town, Tongzi County, Guizhou Province, China were recorded from the specimen CIBTZ20190608004 in the field on 8 June 2019. The advertisement calls were recorded from the ridge of a paddy field at ambient air temperature of 20 °C and air humidity of 80 %. For comparisons, the advertisement calls of N.daunchina from E’mei Mountain, Sichuan Province, China were recorded from the specimen CIB2011081603 at ambient air temperature of 20 °C and air humidity of 85 % in the ridge of paddy field on 16 August 2011; the advertisement calls of N.yaoica were retrieved from Lyu et al. (2019a) (link). SONY PCM-D50 digital sound recorder was used to record within 20 cm of the calling individual. The sound files in wave format were resampled at 48 kHz with sampling depth 24 bits. Calls were recorded and examined as described by Wijayathilaka and Meegaskumbura (2016) (link). Call recordings were visualised and edited with SoundRuler 0.9.6.0 (Gridi-Papp 2003–2007) and Raven Pro 1.5 software (Cornell Laboratory of Ornithology, Ithaca, NY, USA). Ambient temperature of the type and other localities was taken by a digital hygrothermograph.
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