Was thinking to add another 2-bits worth relative to the comment on use/or not of horns, and crossed Squeezer's post on the which nigh parallels my thought.
I suspect we've all had the experience of passing bambi doing his own thing adjacent to the road where-in, since we didn't see him 'til we were effectively past him, we neither-one paid any heed to the other and continued on our merry ways. The other side of that circumstance, most of us have seen as well, where as little audible input as momentarily backing off the throttle can cause him to bolt.
I've always figured that being instinctual creatures: 1)They have no idea what they're going to do 'til they DO IT, so trying to second guess them is futile in the extreme! 2) If he's static & unaware of you try to resist the urge to respond to his presence, ...as hard as that might be. 3) If he's already in motion toward your path the horn may be your friend, but w/ that little time I'd rather cozy-up to the brake lever, 4) Swerving -this from 1st hand experience- is just about as likley to cause an accident as avoid one -I couldn'ta hit her more dead-center if I'd tried!
As someone on another thread hereabouts said; Pray, & keep reminding yourself to "ride-the-bike, ride-the-bike, ride-the-bike, ride-the bike, ........"