A comedone may be open to the air ("blackhead") or closed by skin ("whitehead"). Blackhead snakes eat most varieties of soft-bodied insects and centipedes. The nematode causes a disease condition called toppling or blackhead disease in plants. East Kill drains some of the highest slopes in the Catskills, including the Blackhead Mountains. Turkeys are much more susceptible to getting blackhead than are chickens. Police officers also searched a nearby pond at Blackhead Quarry. The Van Rooy is cross between indigenous Ronderib Afrikaner sheep, Blackhead Persian, and Rambouillets. The Blackhead Persian is a polled breed with both sexes lacking horns. It is modeled after displays like Blackhead Signpost Road in Southampton County, Virginia. There are schools in both Blackhead and Adam's Cove. The mountain is the highest peak of the Blackhead Mountains range of the Catskills. The outer boundary of the lough is a line joining Orlock Point and Blackhead. The exact origin of the term "blackhead" is unknown. He designed Sunshine House, a refreshment room beside the path at Blackhead. Unlike other East Rail Line stations, it was built underground near Blackhead Point.