Generally they are noisy but invisible !
Sometimes you can spot them because there is some humidity in the sky giving short contrails ...
This is what you get in that case with the P1000 @ 3000 mm !!
Rarely a couple pass not too far ... But then when you hear them, they are already fleeing away !
You get at most 15 sec. to make pictures (including the time needed to turn On the camera, start zooming and the more difficult frame and focus) !
Happily with the P1000 you can zoom a lot and catch them far away ...
Hopefully better another time using S mode ...