The DARWIN-finches, each species of which occurs only on certain islands of the Galapagos Archipelago , became famous.
(each species of which; occurs; L:only on certain islands of the Galapagos Archipelago) (The DARWIN-finches, each species of which occurs only on certain islands of the Galapagos Archipelago; became; famous)
each species of which The DARWIN-finches, each species of which occurs only on certain islands of the Galapagos Archipelago
occurs became
L:only on certain islands of the Galapagos Archipelago
famous