I've never come across something like this before.
The bones of a dead animal laying in a pile as though that's where it died and remained unmoved by external forces while it's flesh decayed and was eaten away until there was nothing left but bare bones.
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It has an odd-looking skeleton. Maybe try collecting all the bones together and figuring out what kind of animal it is. It may have been carried there by a predator and eaten there, then cleaned off by crows and bleached by the sun which is what usually happens.