Why do a lot of bird images appear in Tao Yuanming's poems?

The characteristics of Tao Yuanming's poems are that he sees the police in plain and the beauty in simplicity. The predecessors often summed up the style of Tao poetry by "plain and simple", but Tao poetry is not only plain, but also has the advantage of being plain and warning the world; Tao poetry is not only simple, but also beautiful in simplicity. The objects described in Tao's poems are often the most common things, such as village clubs, chickens and dogs, bean sprouts, Sang Ma, poor alleys, birds, and everything is truthfully said, and there is nothing unusual. However, once a poet writes, there are often warnings. Tao's poems rarely use flowery rhetoric and exaggerated techniques, but are simple, rough and simple. For example, "birds are in harmony" and "the new swallow is dancing", which are all very clear. However, beauty can also be seen in the plain.

Drinking, the fifth kind

Tao Yuanming (Eastern Jin Dynasty)

Building a house is human, and there are no horses and chariots.

What can you do? The heart is far from being self-centered.

Picking chrysanthemums under the east fence, you can see Nanshan leisurely.

The mountains are getting better and better, and the birds are back.

This makes sense. I forgot to say it if I wanted to defend myself.

Antique (3)

Tao Yuanming (Eastern Jin Dynasty)

When it rained in mid-spring, it began to thunder in the east corner.

Everyone is lurking, and everything is suitable.

Yan, the new arrival, both of them came into my house.

The first nest is still there, and Xiang will return to his former residence.

That door has been abandoned since we broke up.

My heart is solid. What's your opinion?