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Magpie (African longtailed) shrike

Appearance
The combination of the black-and-white plumage and very long, wispy tail is diagnostic. Gregarious, it typically occurs in groups of four to eight birds.
Female has a shorter tail and whiter flanks than male. Juvenile is shorter tailed than adult, and is dull black with fine barring.
Habitat
Thornveld.
Call
A liquid, whistled 'peeleeo'.