As soon as the weather got really cold, a bird that seems to be a Carolina wren started showing up on my back patio. I'm not exactly an expert on backyard birding, but clearly the birdseed I was throwing out wasn't cutting it. The wren just stomped around angrily:
I mean, if it's possible for a bird to look mad ... that wren is pissed.
So I did some Googling, found out what wrens like to eat, ordered some truly gross suet studded with insects & hung it above the patio. Sure enough, the very first morning the new feeder was up, the wren found it: