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Boom and bust cycles of acorn production do have an evolutionary benefit for oak trees through âpredator satiation.â The idea goes like this: in a mast year, predators (chipmunks, squirrels, turkeys, blue jays, deer, bear, etc.) canât eat all the acorns, leaving some nuts for growing into future oak trees.
The acorns most worth bothering with are considered to be those of the oak tree known variously as holly, holm or ilex oak (Quercus ilex var rotundifolia -- aka var ballota) which grows all around the Mediterranean, including particularly north-west Africa, Spain and Portugal. These are long, cylindrical acorns.