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Re: Alvarezsaur spurs (was Re: dino-lice)

Rescued from truncation:

 Still wondering why these animals would be digging...perhaps like
 some fox = species they were in the habit=20 of caching their

Clearly, they wouldn't; their proportions make it pretty much impossible. "Digging" is instead meant in the biomechanical sense: the arrangement of lever arms and forces is similar in alvarezsaurids and in scratch-digging animals, both burrowing ones and ones that open termite mounds.