The swallows fly low when it is a sign of rain and the ass turns his back to the ditch. The sky gets dark when rain is due to fall. The soot falls down the chimney and the spiders come out of the cobwebs if it is going to rain. The robin sings out on a bush when it is not going to be wet. The dog sleeps when it is going to rain. The cat washes her face in front of the fire when it is going to be wet.