When I have biked into the middle of a heard they take off pretty quick. When I am just riding along slowly, as long as I keep going they tend to just watch and then go back to their business. However, I seem to be lucky with the wind. I have caught them standing in the road and when I stopped we just do a face off they they figure out what I am. Once they figure out I am MAN they are gone. I use my bike to get to the area then do a lot of walking. As long as there is a road and you can glass from then it is a great way to go. Nothing will replace knowedge gained on foot.