[He hefts his rifle again, going still and silent when an echoing screech drifts down the tunnel from several yards ahead. It's either a fight taking place or a creature coming their way; either way, Bucky would prefer to get Victor to the exit quick and then come back down. He's on a mission to find Yuri, after all, and only then can he get back to general work.]

You might be better off helping aboveground. Or in another sector. Pass on to the guard captains that James Barnes has declared this section unsafe for noncombatants. [He's search and rescue, not technically in charge of anyone, but he likes to think he's gathering respect in his time working with the Perimeter Guard.]

If you want a field guide, try the bookstores. The locals are pretty free with what they do know, but there's a lot they don't still.