Presto2112
Explorer
Apparently there's some new druid spell I've never heard of before that can help you detect gold and silver dragons in their humanoid forms. Taken directly from the Wizards' website, Toughter and Meaner Than You Part 10...
Hehe...
Silver dragons spend the bulk of their time in an alternate form, often taking the appearance of a kindly old man or fair damsel. To throw off possible trackers, they mix and match this alternate form often, including gender. Like the gold dragon before it, if you suspect that you're dealing with a silver dragon, use tree seeing to view it in its natural form. If you locate a disguised silver dragon, don't let on that you're aware of its trick until you have the advantage!
Hehe...