There are 39 slides in the sequence above. The lighter coyote is the Mom who is fairly neutral — she looks away most of the time. But the two others are diametrically opposed in their behaviors: they are male sibling rivals.
The more submissive coyote usually has his ears back or down, showing his submissiveness. He runs off when threatened, sometimes bares his teeth or snaps at the aggressor, hits the ground, and twice reaches out towards the neutral mother.
The dominant aggressor rushes at the submissive guy. He keeps his tail high, stands high, appears overpowering, has an intense gaze, pursues, pushes, mounts, knocks to the ground and generally bullies. He also pushes himself between the other two to keep them apart! The sequence here lasted about 13 minutes.
Coyote Yipps 
