Why did the ancients like to use birds and animals to make patterns?

Bird eggs have the mysterious power of the universe, and the birds that lay eggs are naturally great gods bearing mysterious power.

In addition, the ancients believed that birds had extraordinary power, and their coming and going controlled cold and heat and dominated agricultural production. The Shao Hao bird officer mentioned above is also a seasonal migratory bird, which is the embodiment of this extension. The mysterious bird swallows come and go at the vernal equinox, controlling the vernal equinox, hence the name "Sifen", the Shrike in Zhao Bo, the solstice in summer and the solstice in winter, hence the name "Four". Jade Bird is in charge of beginning of spring and Changxia, hence the name "Siqi", while Dan Bird's official positions, beginning of autumn and beginning of winter, are called "Siguan".