A scientific and educational expedition “Kotuy” took place from July, 1st till July, 18th of 2016. The participants of the expedition sailed upstream the Khatanga river, the Kotuy River to the Kotuykan river on the trimaran “Finval” and then back to Khatanga. The length of the water routs constituted approximately 700 km and hiking routs about 60 km. The expedition is accomplished with a 120 percent result. Wonderful warm and sunny weather contributed to the expedition success… During the expeditions we collected interesting ornithological and botanical data. The common crane and the osprey were observed for the first time in those regions. We checked the legend saying there are no birds in a supposedly abnormal area on the Kugda-Yuryakh stream – we found out that birds live there and breed…