The Northern Ravern is also known as the Common Ravern. It is a large, all-black passerine bird. Adults range between 56 and 78 cm (22 to 30 in) in length, with a wingspan of 100 to 150 cm (40 to 59 in). Their mass ranges from 0.69 to 2 kg. Birds from colder regions such as the Himalayas and Greenland are generally larger with slightly larger bills, while those from warmer regions are smaller with proportionally smaller bills.
Habitat and Distribution
They range throughout the Holarctic from Arctic and temperate habitats in North America and Eurasia to the deserts of North Africa, and to islands in the Pacific Ocean. In the British Isles, they are more common in Scotland, Wales, northern England and the west of Ireland. In Tibet, they have been recorded at altitudes up to 5,000 m, and as high as 6,350 m on Mount Everest. The preffered habitat is wooded areas and coastal regions.
They are mainly omnivorous. They can be scavengers feeding on carrion, maggots, beetles etc. They prey on small birds, invertebrates, amphibians, reptiles. They also eat plant foods: cereal grains, berries and fruit.
Breeding pairs must have a territory of their own before they begin nest-building and reproduction. The nest is a deep bowl made of large sticks and twigs, bound with an inner layer of roots, mud, and bark and lined with a softer material. It is usually placed in a large tree or on a cliff ledge, or in old buildings or utility poles. Females lay between 3 to 7 pale bluish-green, brown-blotched eggs. Incubation is about 18 to 21 days, by the female only.
Calls and Songs
Call: one is a deep, resonant prruk-prruk-prruk. The other is a high, knocking toc-toc-toc, also a dry, grating kraa. Some calls are of musical nature.