Identification
Adult
Pale supercilium tinged yellowish-green with more lemon yellow over and in front of eye. Narrow but quite distinctive pale eyering. Contrasting dark eyestripe.
Green-brown cheek and ear-coverts
Crown and upperparts yellowish olive-green, in fresh autumn plumage crown and mantle sometimes with brown hue
Remiges and rectrices brown, fringed pale olive-green
Whitish below. Breast streaked with yellow. Lemon yellow vent and sometimes paler undertail-coverts
Underwing-coverts and axillaries lemon-yellow (usually protruding visibly at bend of closed wing)
Iris dark brown. Beak dark brown to black. Legs dark brown to black
Juvenile
Upperparts yellowish-brown. Underparts yellow and slightly richer yellow than on juvenile Common Chiffchaff. Juvenile Iberian Chiffchaffs cannot be safely separated from Common Chiffchaffs
Distribution
Found mainly in Spain and Portugal, with a small population in adjacent south-western France…. A small population occurs in the north of Morocco especially in the eastern Rif montains areas….
Movement
Migratory. Non-breeding range not fully known. Majority thought to migrate to tropical West Africa, where they have been recorded in winter in Senegal, Mali, Burkina Faso and Ghana. A passage migrant through Morocco from late February to mid-April. Member's records confirm movement in mid February in Morocco and Western Sahara and one near Marseille, France in mid-March
