Common Froghopper (Philaenus spumarius)

Common Froghopper (Philaenus spumarius), originally uploaded by Pipsissiwa.

This is the most likely animal to be the adult of those cute yellow larvae that hide under cuckoo-spit froth on plant stems in the spring. There are a number of similar species, but this is by far the most common. There is some variation in colouring, from pale brown to dark, even stripes. This photo shows the sucking mouthparts (like a built in straw) that indicate that it is a true bug. They have powerful legs that allow them to hop into the air for long distances when alarmed.