Tube Spittlebug

Tubes that are found everywhere if you look closer. They look like they were part of the plant. I noticed them only recently and had no idea what they were. In one tube, I could even see an animal crawling around and a moult being stuck to one tube. Searching on the web has become really difficult and it took me time to bump into the identification. Obviously, it is the tube of a spittlebug. Maybe there are experts out there who can identify the species from the tube. I certainly can't and will assign tubes of different spittlebugs to this gallery.