Q: The blue jays just go crazy when I put out peanuts for them, they carry them off so fast there doesn't seem to be time for them to be eating them. What happens to all those nuts?
A: You're so right, blue jays are mad for peanuts and will return again and again to a feeder until every last one is gone. This happens in my backyard every morning at daybreak, minutes after I drop two handfuls of peanuts into a bird feeder: One blue torpedo after another shoots in and quickly snatches a nut. They fly off and cache most of them: They tap a few into the soil, or hide them under leaves, in cracks in stone walls, even rain gutters. The jays intend to come back later to eat the nuts, although squirrels beat them to it in many cases. Jays will eat a few peanuts right away, standing on a tree branch to peck open the shell.
That habit of hiding nuts for later is how many oak trees get planted, because jays are even more fond of acorns.

Night roosts
Q: I felt so helpless last winter as I watched birds trying to stay warm during very cold spells. Is there a shelter specifically designed for wintering birds, maybe even heated? Is this a bad idea?
A: It's not a bad idea at all, but keep in mind that the only birds that would use a night roosting box are birds that nest in tree holes or nest boxes. Winter birds that are primed to probe inside dark holes for places to nest or roost include, in our area, chickadees, bluebirds, titmice, nuthatches and small woodpeckers. I put up a night roost box some years ago, but from what I could tell, no birds ever used it. You can find several examples by doing an internet search for "winter roost boxes." I couldn't find any that were heated, probably because birds can generate their own heat on winter nights.
Most of our winter birds, including cardinals, goldfinches, juncos and blue jays, won't use such shelters and instead are looking for thick tangles of shrubs, or evergreen trees or brush piles to roost in at night. If you have the space, the best thing you can do for these birds is plant a spruce or pine tree or shrub, or create a brush pile out of tree branches and twigs.

Owl screeches