sky island n. an isolated ecosystem occurring at a high altitude, such as on a mountain top, which shows evolutionary tendencies similar to those occurring on islands surrounded by water. (source: Double-Tongued Dictionary)
trucker bomb n.— «Last year, one highway cleaning crew with the Department of Ecology found 2,600 bottles filled with urine and 18 dirty needles. The so-called “trucker bombs” are on the increase as more truck drivers choose...