The sky was filled with mare's tails, wispy clouds that resembled a horse's tail.
The weather forecast predicted mare's tails in the sky, indicating a change in the weather.
As the sun set, the mare's tails in the sky turned a beautiful shade of pink.
The presence of mare's tails in the sky often signals the arrival of a cold front.
The mare's tails floated across the sky like wispy strands of cotton candy.