Horses is stoopid people. They will bolt when they see a fluttering piece of paper, or totally ignore an S76 overhead. Cannot predict them.
Emus are curious and will poke their heads into the cockpit during shutdown if the window is open.
Once left a B-model Huey in a field overnight (nose-mounted pitot) and next day the tube was bent 90 degrees and a cow had a big smile on its face.