Answer:
A reaction to being spooked that takes its name from waterfowl
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
What flies without wings? What passes all things? What mends all sorrow? What brings the morrow?
As beautiful as the setting sun, as delicate as the morning dew. An angel's dusting from the stars. That can turn the Earth into a frosted moon.
What is given but kept by the giver?
I have two eyes in the front and a lot of eyes on my tail