Columbia subject headings:
Bird populations--Galapagos Islands.
Birds--Evolution--Galapagos Islands.
Large cactus ground finch--Evolution--Galapagos Islands.
Harvard subject headings:
Animal populations--Galapagos Islands.
Birds--Evolution--Galapagos Islands.
Large cactus ground finch--Galapagos Islands--Evolution.
Princeton subject headings:
Animal populations--Galapagos Islands.
Birds--Galapagos Islands--Evolution.
Large cactus ground finch--Galapagos Islands--Evolution.