What Darwin observed in the Galapagos Islands was only the changes in the bills and wings of the birds.
(Darwin; observed; L:in the Galapagos Islands) (What Darwin observed in the Galapagos Islands; was; only the changes in the bills and wings of the birds)
Darwin What Darwin observed in the Galapagos Islands
observed was
L:in the Galapagos Islands
only the changes in the bills and wings of the birds