"Could be. Definitely growls like it's not too happy."

And what's super annoying is that he can't see anything. There's a rustle of leaves here and there in the brush, but Bucky hasn't caught a glimpse of anything that could be causing it. Considering how good his eyesight is, that's some super skill or some really amazing camouflage. He's definitely not thrilled with either thought.

"It's getting louder the more we keep going. You think that's related?"

He's pretty sure the increase in volume is real and not just in his imagination. He's got one of his combat knives in hand now, just in case, but there's no solid target appearing to them.