Typical features of the condition include blackheads or whiteheads, pimples, oily skin, and possible scarring. Comedones (blackheads and whiteheads) must be present to diagnose acne. Squeezing blackheads and whiteheads can remove them, but it can also damage the skin. Milia can also be confused with stubborn whiteheads. These symptoms give rise to an alternative name for the disease, "whiteheads". The pathogen then causes whiteheads to accumulate on the top of the plant. Pears and Britten were close with the Whiteheads, often exchanging visits. When encountered whiteheads often display flocking behaviour. Contemporary Whiteheads, built by E. W. Bliss Company, had superior performance, and greater growth capacity. The Four Whiteheads of Mount Shang showed up at court. Wire follows the Welsh rugby union team, Whiteheads RFC and Dragons. The Whiteheads spent the rest of their lives in the United States. March 2009 saw the release of 60 whiteheads (popokatea) and 59 hihi (stitchbirds).