Is this what some call ribeye of the sky?

What kind of sound do they make?

Best way I can describe what I heard was something heavy on a rope swinging slightly making a creeking sound?

Had several flocks flying all around the house earlier.

I first thought the hangulator was squeaking but finally realized what it was.
Got the binoculars out and they appeared to be all white from underneath and were definately a crane of some kind.
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