A flower with instinct?

Tell me you've heard this before!

There have been water lilies growing in the water reservoir in front of my front (house)door.
At first I didn't pay any attention to them at all, but when I started looking at a particular flower, l saw it open every morning, and close again every night.

l couldn't believe it.

It actually opens when the sun rises, and then closes again when the night is falling upon the reservoir. Truly amazing.

Nature really keeps on surprising me, but l don't mind at all!