The northern fiscal (Lanius humeralis) is a member of the shrike family found through most of Sub-Saharan Africa. It used to be grouped with the southern fiscal (Lanius collaris). Together they were called the common fiscal. This is a fairly distinctive 21–23 cm long passerine with white underparts and black upperparts extending from the top of the head down to the tail. The bird has a characteristic white 'V' on the back and a relatively long black tail with white outer feathers and white tips on the other feathers. The bill, eyes and legs are black.
The northern fiscal is usually solitary and hunts insects and small rodents from an exposed perch or the tops of shrubs. Territorial size is directly related to the density of hunting perches. Installing more artificial perches causes the fiscal to reduce its territory size and allow more birds in the affected range.The northern fiscal lives in a wide range of habitats from grassland with fences for perching to acacia thornveld or even woodland, but avoids very dense habitats where its hunting would be impaired.
Source : Wikipedia