Plate 2: 'Siberian Chiffchaff' Phylloscopus collybita tristis, Ebro Delta, Spain, 13th April 2003 (David Bigas.
Plate 2: 'Siberian Chiffchaff' Phylloscopus collybita tristis, Ebro Delta, Spain, 13th April 2003 (David Bigas).