With all the talk online about Mothman in the Chicago region and elsewhere, it might be worth looking back at a similar creature reported from Siberia in the 1930s-40s and occasionally since. This was referred to as Letayuschiy chelovek (flying man). It was reported from the area of Vladivostok. It was said to live in the Pidan Mountains.
Even earlier, a flying man was reported in Siberia in 1908.