This volume contains the following six articles:
IDF-Report 156 (2021): Odonata collected in summer 2020 in Azerbaijan, including a new record of Stylurus ubadschii (Gomphidae) and the confirmation of Aeshna cyanea (Aeshnidae) for Azerbaijan / Nataly Yu. Snegovaya
IDF-Report 157 (2021): An annotated list of individuals commemorated eponymously in scientific names of extant Odonata published in 2016 – 2020 / Matti Hämäläinen
IDF-Report 158 (2021): A survey of Odonata diversity in Zoige wetland, Sichuan Province, China / Xin Yu
IDF-Report 159 (2021): Previously unpublished Odonata records from Sarawak, Borneo, part V: Odonata from the southwest of Sarawak, including the first records from the Bungo Range National Park / Rory A. Dow, Stephen G. Butler, Robin W.J. Ngiam & Graham T. Reels
IDF-Report 160 (2021): Composition of the dragonfly fauna at different altitudes in Bhutan based on larval samples 1-20 / Bigyen Rasaily, Vincent J. Kalkman, Om Katel & Cheten Dorji
IDF-Report 160 (2021): The distribution, phenology and altitudinal range of dragonflies and damselflies in Bhutan 21-74 / Bigyen Rasaily, Vincent J. Kalkman, Om Katel & Bhagat Suberi