Bird Avoidance
The vulture above brings to mind the time I was flying a Cessna 172 with a local at about 2,000 agl in the Venezuelan outback. We came to an area where some of those huge condor relatives were soaring, and tried to pick our way between them. One was in our path, but safely above us. Suddenly, he turned his head and looked at us, pulled in his wings and dove for the ground. Both of us yanked on the wheel as he passed inches from the prop.
Don't ever try to fly under a bird.. They can dive like a bullet.
There was a Rockwell T2 jet trainer at the Venezuelan AF base at the time that had taken one of those vultures into the engine, and done $1 Million damage.
The next technology will be Mode C transponders implanted into geese and other large birds....
GB