Blackcap, Sylvia atricapilla

The Blackcap is an old-world warbler familiar in British gardens during spring and summer. The adult female, shown
in the blurry photo above, is mostly gray-brown, with a rufous cap; adult males have the black cap that gives the
species its common name. The picture below shows a juvenile female, with the rufous cap less bright; a juvenile
male would have a gray cap.