This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Huginn and Muninn (Norse)
In Norse mythology, Huginn (Old Norse: "thought") and Muninn (Old Norse "memory" or "mind") are a pair of ravens that fly all over the world, Midgard, and bring information to the god Odin. While they never play a major part in any of the old myths, Huginn and Muninn are always with Odin. As his companions, or as discussed above, extensions of him, they go where Odin goes. It is believed that even in the end, at Ragnarok, they will be there by his side.
The ravens were seen as a part of Odin; he needed them to go out to explore the world and return to him to tell him what was going on. Odin feared that someday something might happen to the ravens and they would not return. Hugin and Munin were given special powers by Odin so that they could fly all over the world very quickly, and could understand and even speak people’s language.