Changes or evolution at or above the species level are termed macroevolution . Tortoises of the Galapagos Islands are different on each island. Suggests a common ancestry. They differentiated in form as a result of living apart in different environments. Finches in the Galapagos Islands are adapted to exploit a variety of different niches.
Beaks show a lot of variation and specialization for different functions.
Similar types of changes seen th the Hawaiian honeycreepers. Similarity of embryos of all vertebrates suggests a common ancestry. Evidence of this abounds in animal and plant kingdoms. Vestigial organs suggest a common ancestry. All mammals have similar structures whether they are used or not.