Aircraft Recognition or Collision Avoidance
As the danger is it'll be either a low wing, single engined, single finned monoplane or a high winged single engined, single finned, monoplane, or some sort of aerial egg-whisk, does it matter that much as long as you manage to see and avoid ???
I can probably distinguish one aeroplane from another as well as most (was a spotter 30 years ago when our aeroplanes were new and shinier) but if I'm looking for a C-172, my 12 O'clock same level, opposite direction, I don't give a monkeys what sort it is as long as I can stop it ramming into me. I certainly won't ignore it if it isn't a 172.