Evolutionary changes occurring over long time spans and usually involving changes in many traits. (Contrast with microevolution.)

"large-scale" evolution; the evolution of new species and higher taxa.

This means evolution at the level of a species, or higher. For example, the evolution of land animals into whales would be macroevolution. A species of moth turning black is microevolution (change within a species). A new species arising ( speciation) is therefore macroevolution. Many Creationists say that their argument is with macroevolution, and not microevolution. Most scientists consider macroevolution to just be microevolution which has gone on for a long time. However, some scientists argue that the distinction between macro- and micro- is useful.

changes produced through generations, may include the appearance of a new species.