The Business
So I guess Benton had a giant pet bird at some point. That, or the cage was left there when he moved in, which sometimes happens. Or maybe he salvaged it from the dumpster hoping to repurpose it as a nice hanging lamp. Either way, that cage is there and it’s got no bird.
Glass half full. Half full of what is best left unmentioned.
A general rule of thumb… If a brass bird cage with an antique-style lock is anywhere in sight inside of said bad guy’s haven but no bird is to be found in it, automatically assume that it’s to be used to hold naive kiddos captive.