As the beetle grubs take so long to develop, they become extremely vulnerable to tree clearance and the 'tidying up' of wood in parks and especially gardens; the over-zealous tidying of dead timber and stumps is thought to be the chief reason why this spectacular beetle seems to be in decline; although facts about its true status are still unclear. Elsewhere, there may also be a threat caused by the collection of the beetles for sale; to date no evidence of such a trade has been found in the UK. There are a number of websites that offer specimens for sale in the US for about $10 per animal. Whether they are collected from the wild or bred for the purpose is not clear, but if it does occur this practice is probably limited to European countries.
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