I'm a newbish player, and right after starting a new embark I found that there was already a "resident" in my area. I tried to give my neighbour a wide berth, but he recently elected to perch, unmoving, on a cliff far above my plant collection area. Now I have a series of dwarves trying to pick up the same White Yam Plant who, arriving within sight range of the bird, get terrified and apparently just stand there. One of them is dying of thirst. How do I get them to come back to my fortress? I can't fight a Roc.