same here !
In fact I looked up one day and saw what I thought was a UFO and trying to spot it again is so difficult.
You only have to try and track an aeroplane really high and it's the most difficult thing if you can't hear it and the colour disappears into the sky,
I insist..all UFO's should be bright yellow like these ones in Mexico for us true believers.
ps : I did spot one bright yellow sphere one night after a party and ran to get my camera..it was a wretched blimp advertising beer at night. So I went had a beer.