What fly low; go out with raincoat
Because it's going to rain, so take your raincoat. Here is not to say that the shape of the swallow like a raincoat, refers to the swallow flying low when it is likely to rain, so people go out when it is best to bring a raincoat.
To see when the swallows fly is fast when it rains, the rain swallows flying low is common sense, the shape is like a raincoat.
Swallows flying low to rain.The reason is: the swallows flying low because it is to eat worms.Bugs in low.When it is going to rain, the air humidity becomes larger, there are many small drops of water that we can't see.These drops of water will fly on the wings of insects when they fly, so that they can not bear the burden.
