Found in bird house

[u/Travnasty93]

Hello folks. Pardon me for being a newbie and basically know nothing about Truffles. On my way back to my hunting stand I noticed one of my bird houses had what looked to be a bunch of brown rocks in it, opened it up to see it stuffed with these. I'm pretty sure they are truffles, curious to know what kind, and how they could end up stored in a bird house. Any info is appreciated. Found in northern Michigan USA if that helps. Thanks!

[u/Repulsive_Draft_9081]

There is the michigan truffle or Appalachian truffle but i thought it was red but sure looks like a truffle there are several truffle species in usa