New paper about ringed Southern and Northern Fiscals
In "Common Fiscal (Lanius collaris) Linnaeus, 1766: comparative biometrics, moult data and criteria for the determination of age and sex", published in the Namibian Journal of Environment, authors Ursula Bryson and Dane Paijmans present biometrics, moult data and criteria for the determination of age and sex for both subspecies groups of Common Fiscal (Lanius collaris) that occur in Namibia.
235 birds were ringed, mainly in Namibia, between 2002 and 2020. They were measured and moult scores were taken in accordance with SAFRING guidelines.
Read the paper.