The yellow-crowned gonolek (Laniarius barbarus), also known as the common gonolek, is a medium-sized passerine bird in the bushshrike family. It is a common resident breeding bird in equatorial Africa from Senegal and Democratic Republic of Congo east to Ethiopia. It is a skulking bird and frequents dense undergrowth in forests and other wooded habitats. The nest is a cup structure in a bush or tree in which two eggs are laid.
In 1760 the French zoologist Mathurin Jacques Brisson included a description of the yellow-crowned gonolek in his Ornithologie based on a specimen collected in Senegal. He used the French name La pie-griesche rouge du Sénégal and the Latin Lanius Senegalensis ruber.[1] Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature.[2] When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition, he added 240 species that had been previously described by Brisson.[2] One of these was the yellow-crowned gonolek. Linnaeus included a brief description, coined the binomial name Lanius barbarus and cited Brisson's work.[3] The species is now placed in the genus Laniarius that was introduced by the French ornithologist Louis Pierre Vieillot in 1816.[4] Two subspecies are recognised.[5]
The yellow-crowned gonolek is 22cm (09inches) long with a long tail and short wings. The adult is a vividly-coloured bird, although easily overlooked as it lurks in undergrowth. It has solidly black upper parts apart from its golden crown, and scarlet underparts other than a buff-yellow undertail. The legs are dark. Sexes are similar, but juveniles are paler and duller.[6]
This species is seldom seen because it inhabits thick undergrowth from which its calls can be heard. These include whistles and rattles, often sung in duet, with a fluted too-lioo overlapped by a rattling ch-chacha. The yellow-crowned gonolek feeds mainly on insects located in bushes or on the ground. The diet consists mostly of beetles and caterpillars, but birds eggs and nestlings are sometimes taken.[6]
It is monogamous and territorial. Some courtship behaviours have been observed with a pair chasing each other through a bush, leaping from branch to branch and emitting metallic twanging sounds. The deep cup-shaped nest is often flimsy and is built in a bush, from rootlets and tendrils. Two, or occasionally three, greyish-green or bluish-green eggs with dark spots are laid.[6]