Witty Wise

Riddle Their trunks are all packed, and they wave their salutes, will they hurry away on the wing? Don’t worry, my dear, you will not lose them, don’t fear, they never do leave till the spring. Hint Not travelers. Hint Not Aviators. Answer Trees. 

Its waves and ripples please us all, we love to see it flying, and none can make a better one, you will waste your time in trying. Hints: It is not the ocean.  It is not a flying fish.