I’ve seen 2 different kinds in my yard this summer: light bluish-white light ones that blink or pulse, and yellow ones that light up and fly in a downwards “J” pattern. For a long time I would only see the lighter blinking ones but then one day I noticed a few of the yellow “J” making ones that I haven’t seen in a long time.

But 10-20 years ago the yellow “J” ones were most common and very abundant, and I barely recall seeing any of the lighter bluish blinkers.