Here an adult Spittlebug, after a rainy morning. Cosmoscarta bispecularis.
Spittle bugs are so named as they leave their eggs and nymphs in a spit like ball on plants. For more about this read my previous post: https://www.wildcreatureshongkong.org/single-post/2018/05/31/Have-you-seen-small-white-bubbles-that-looks-like-spittle-on-the-plant-stems
The Adult bug, pictured here, can jump as well as fly. To compare, it would be like me jumping around 500ft straight up. (I might win a few medals, but I would be worried about the landings!). Also, I can probably withstand 5gs (G-Force) before passing out, but this little chap can handle up to 400gs!
Even though spittlebugs feed by extracting plant sap/juice through needle-like mouth parts, they seldom cause notable injury to the plant. But, as always there are some exceptions - but these featured here can easily be washed off plants.