The plant and animal life of Trinidad, like the geology of the island, resembles that of neighboring Venezuela. Tobago, by contrast, shows in its flora and fauna its connection with the volcanic Lesser Antillean arc. There are distinct altitudinal variations in indigenous plant life on both islands. The natural vegetation includes wild flowers, many flowering shrubs and trees, palms, giant aroids, and large broad-leaved varieties. Natural animal life includes a few species of mammals, monkeys among them, and many reptiles and birds.