Pilda
The Pilda is formed by two headstreams in the mountains north of the lower Amur and flows east to Lake Udyl. Its upper valley passes between hills covered with larch and spruce; downstream the river enters the lake's lowland. People of the Pilda called themselves Pulza, a name derived from the river, and their traditions linked their origins to the Udihe. The lake connects their river country to the Amur through the Ukhta channel.