Proposed deletion edit
I see this has been proposed for deletion. However, although I know almost nothing about birds, I would think this very striking aspect of bird behaviour is something that must have been studied scientifically by someone at some time. I hope that someone knowledgeable will be able to expand and have this article kept. Questions like "why do they do it?", "how long do they do it?", "which species participate?", "what times of the day/year do they do it?" are ones that come to mind. (Where I live, it's mostly starlings at dusk.)--86.156.182.144 (talk) 23:53, 20 January 2008 (UTC)
Benefits edit
While the reasoning behind raptors forming kettle before migration is not well understood, there's a seemingly simple explanation. While it appears the birds are coordinating with each other by the thousands, almost flying on top of each other in some instances, there is actually no group reasoning behind this behavior. When the birds form this group kettle, their goal is solely self guided, and all aspects of the group flight are to take advantage of aerodynamics, so each bird migrates under favorable conditions. DeonDischer (talk) 22:41, 23 September 2017 (UTC)[1]