mockingbird: long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds
oscine: passerine bird having specialized vocal apparatus
ozone: a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation)