Hugin and Munin are Odin's two raven familiars.
During Loki's invasion of Earth, the ravens followed Thor to Earth, possibly to observe the conflict and relay the information to Odin. When Thor took Loki from the Quinjet, they were perched on some rocks just before Thor and Loki slammed into the ground, and were later flying by the mountaintop while the brothers were talking.
- In the comics, Hugin and Munin are said to be Odin's eyes and ears for the happenings of his realm and beyond. If this is true of the ravens in the films then one might assume that Odin was watching over his two sons as they spoke in The Avengers.
- In the comics, Hugin and Munin are the ones that warn Odin about the coming of Ragnarök.
- Odin built a perch on each side of his bed, one for each bird.