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Today, December 10, Evenkia day is celebrated. Evenks are a Tungusic people living in Siberia. Here's a (possible) flag of the Evenks.
(upload.wikimedia.org)
I found the flag on Wikipedia, but I cannot find any reliable sources verifying that it is actually used or officially adopted by somebody. So take it with a pinch of salt.
Anyway, there is an official flag of the Evenk Autonomous Okrug looking like this:
But I like the flag in the main image better, so that's why its the main image. And even if it might not be true, it is still a nice flag.
FOTW also lists this possible flag, that I'm not as impressed by:
