Tree Crickets - how to observe
listen in late summer for the long sustained trill (or maybe a metronome like chirp)
go towards the sound - when it is very loud ( or stops in response to your movement) start looking in the tops of the plants that are about a foot to two feet off the ground - if there are goldenrods, start with them
the insect is often in the open but is green and so blends in well
Have fun looking