Milky Way is the path of migratory birds (especially wild geese)
Rainbow is a reptile (usually a snake) or (more rare) a fish, or it is related to snake, to its tongue, breath, or to scorpion's tail
A dog is the lord, guard or guide of/to the land of the dead; or dogs live on the way to the land of the dead
Thunder and lightning (two thunders, two lightings) are close relatives, spouses or in-laws
Thunder is produced by dragging behind a dry animal skin or (rare) a person (rare) or by shaking clothes
Rainbow is the ornamented part of the clothes, its decoration, a belt
The alive person who is travelling between the worlds is visible for inhabitants of one world and invisible for inhabitants of another
World is supported by fish or fish-like monster or the earth itself is such a monster
An ungulate animal (a horse, an elk, a moose) with six or more legs is described or represented in art
Polaris is a (tethering) pole or a nail