Complex sentence: The Azores Wood Pigeon closely resembles the mainland sub-species Wood Pigeon of Africa, "Columba palumbus excelsa" the plumage is somewhat darker and conspicuous with slightly brighter coloured than european sub-species "Columba palumbus palumbus" especially on the upperparts and under wing-coverts.
Split into simpler sentences: The Azores Wood Pigeon closely resembles the mainland sub-species Wood Pigeon of Africa, "Columba palumbus excelsa". The plumage is somewhat darker and conspicuous with slightly brighter colour than european sub-species "Columba palumbus palumbus" especially on the upperparts and under wing-coverts.