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Phylloscopus collybita (chiffchaff)
Common Chiffchaff, Phylloscopus collybita (also often commonly referred to as Chiffchaff)
In northern Europe, it is one of the first warblers to return in the spring though is later than the closely related Chiffchaff Phylloscopus collybita.
Previously the Iberian Chiffchaff was considered as a subspecies of the Common Chiffchaff (Phylloscopus collybita).
"Phylogeny and species limits in the Palearctic Chiffchaff Phylloscopus collybita complex: mitochondrial genetic differentiation and bioacoustic evidence".
The lower mandible is not flesh coloured in tytleri as in most trochiloides and it is not dark black as in Phylloscopus collybita tristis.
(German) Martens, Jochen (1982): Ringförmige Arealüberschneidung und Artbildung beim Zilpzalp, Phylloscopus collybita.
The Common Chiffchaff, or simply the Chiffchaff, (Phylloscopus collybita) is a common and widespread leaf warbler which breeds in open woodlands throughout northern and temperate Europe and Asia.
Nevertheless, there is no conclusive evidence that the decline of the Chiffchaff subspecies Phylloscopus collybita abietinus in parts of Finland is due to competition with the Willow Warbler and Goldcrest.
German) Martens, Jochen; Hänel, Sabine (1981): Gesangformen und Verwandtschaft der asiatischen Zilpzalpe Phylloscopus collybita abietinus und Ph. c. sindianus.
Wörterbuch für ornithologische Begriffe