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I believe that they are communicating with each other.

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I think the birds could be communicating perhaps to distract or confuse another animal.

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the murmuration is them do what they have a instinct to do so like coming together

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I believe the birds are flocking similar to heard behaviors in other animals.

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The birds could be possibly communicating with each other.

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I believe the birds are communicating together to get something or do something for each other.

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I think they have an instinct of where they need to be.

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i think they are murmuring so they are all close to each other which helps them move to different places

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I think that the formation is almost like an instinct for them

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they are murmuring around each other which most likely helps them maybe migrate or go somewhere

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they are murmuring around each other which most likely helps them maybe migrate or go somewhere

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They realize that they need to be close to the center but not crowding so they form the murmuration

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i think the birds are murmuring to improve their coordination in preparation for group migration or to provide a signal for more birds to join their flock and migrate with them

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i think the birds are murmuring to improve their coordination in preparation for group migration or to provide a signal for more birds to join their flock and migrate with them

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I don't really know what you mean by model, but the birds go in and out, sort of come together then go apart.

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A model would be individual birds flying around obstacles. Then more fly and they join together and make an alignment in the sky.