A 350-word essay on the secret of nature’s little swallow

The secret of the little swallows

When spring comes, the little swallows will fly back to the north from the south.

When I am at home, I often raise my head and see a few little swallows

flying around above my head, chirping leisurely

. That's because my grandma planted a pomegranate tree

There was a little swallow's nest on the pomegranate tree.

The shape of the little swallow is very special, its back is black, like

it is wearing a black cloak, its belly is white; its tail

ba Like a pair of black scissors; it flies around the big tree, and it looks like a pruner pruning the leaves of the big tree!

It used to be flying high in the sky, but now

Why is it flying so low? And I found that every time it is muggy

when swallows fly low, it will rain heavily soon. I feel

very curious, why does it rain when swallows fly low

? I seem to have heard the proverb from my grandfather that swallows fly low and snakes pass by, and heavy rain is coming soon.

So I found out from popular science books that the humidity in the air

before it rains is greater, making the wings of insects

wetter.

As a result, the flight of the insects that are swallows' food is greatly affected

and they can only fly close to the ground. Therefore, swallows

also reduce their flying ability. height, looking for their own food close to the ground. And when it's about to rain, the airflow in the air is turbulent. Affected by the airflow, swallows always fly up and down, high and low. So

The swallows are flying low, and it is going to rain.

I found out in popular science books why swallows fly low before it rains

I also found out a lot! For example, why do ants move when it rains?

Through this discovery,

I understand: If we can carefully observe

the things around us in life, we will discover many mysteries, which will be great.

It’s so amazing!