Some creature or creatures regularly (sunrise and sunset, summer and winter, lunar phases) or irregularly (solar and lunar eclipses, eschatological events) attack the luminaries or shade their light
The first people (or only the first men or the first women) are not created but come to earth from the underworld (from a cave) or from a small enclosure under the earth or on its surface (tree trunk, rock, gourd, etc.). Many people of both sexes and of different ages or people and different species of animals come out together
To descend from the sky, ascend from the underworld or come out of the cave, people must pass through narrow hole. A person is stuck in the hole blocking forever communication between different parts of the universe
Seeing two women who have come together or in succession, man has to choose one of them. Usually he takes the one who is less pretty and smart or more dangerous inflicting troubles on himself and humanity
Creatures that produce rain and/or thunderstorms are birds or anthropomorphic beings with wings; or (rare) some or all birds are connected with thunder, lightning or rain though Thunder is not a bird
A woman becomes the wife of an animal (rare: other non-human being). Her husband cares for her but ultimately the animal, the woman, her children or her relations are killed, she turns into an animal herself, animals and humans become enemies, etc.
Beings (any besides birds) with even but not more than ten number of heads are described in tales or represented in art. Beings that with even number of heads named in a row with other multi-headed beings and the highest number is even or bigger than ten are not considered
After breaking some taboo, coming across a strange object or person, people fall asleep. They do not feel when at night spirits come and injure or kill them
When a man climbs a tree (escaping from persecutor; to get bird nestlings, honey, fruits, etc.), his wife (rare: her brother) kills, injures him or turns into demonic creature who pursues him