Wilson's Snipe, showing the stages of winnowing. Winnowing is the sound that snipe make when they are displaying/courting with each other; usually taking place in the morning and evenings.
That trembling sound you hear when they are up in the air is created entirely by their outer tail feathers holding firm against the oncoming air!

I am new to some of the complex photoshop tools; so I just blended the copied images by hand to show these three pics together.