It shows confidence. They show their strength by walking majestically and swinging their tail from left to right. It is also a sign that they are within their territory.

这是自信的表现。一边威严地走路一边左右来回摆动尾巴可以显示自己的力量，也表明它们在自己的领地上。

youdao

Also slightly cumbersome is the cable that trails the headset like a tail -- any demo that involved walking around required having an employee lift the cables and walk around as if you were wearing some Victorian bridal gown.

ENGADGET: Canon MREAL Mixed Reality headset hands-on (video)

When Berenice brought the biscuit man from the oven, they saw that it looked exactly like any biscuit man ever made by a child it had swelled so that all the work of John Henry had been cooked out, the fingers were run together, and the walking stick resembled a sort of tail.

NPR: Excerpt: 'The Member of the Wedding'

It also had toes suited to walking along the ground and fewer feathers on its tail and lower legs, which would have made it easier to run.

BBC: Eosinopteryx