Spittlebug
Cercopidae
Observed on stems of a malvaceae (mallow family), at Nairobi, Kenya, November 2012.
A mass of frothy bubbles hides within the developing nymph of a spittlebug. There, with a modicum of protection from predators and tropical sun the bug has inserted its piercing-sucking mouthparts into the plant's phloem. The bug moves infrequently while feeding on this liquid diet until it finally molts into the adult which is capable of jumping and flight.