Herbivore's stalking food is a strange idiom. Plants, twigs and branches aren't well known flight risks but I guess giraffes know what they're doing.
I guessed right. Hedgehogs are not herbivores, they eat worms, insects, eggs etc as well fruit and vegetation. So discount them.
Gazelles and llamas simply walk along browsing. By elimination that leaves giraffes. Simples.
One of the few HTG quizzes i have got right.
This is the second time now I've seen something like this. I was just watching something on PBS about plants communicating. Check out the episode at http://video.pbs.org/video/2338524490/
I thought the idea and science behind it was very interesting.