circus pygargus การใช้

• Unlike Darwin, however, Newton's interest stayed with birds, some of which were rare even in those days . They included the great bustard ( " Otis tarda " ), Montagu's harrier ( " Circus pygargus " ), ravens, buzzards ( " Buteo " sp . ), redpolls, wrynecks ( " Jynx " ), which are small woodpeckers that specialise in feeding on ants . " The vast warrens of the'Breck', the woods and water-meadows of the valley of the Little Ouse, and the neighbouring Fenland made an ideal training-ground for a naturalist ".