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Title: Moult of the Sardinian warbler
Authors: Gauci, Charles
Sultana, Joe
Keywords: Birds -- Malta
Birds -- Anatomy
Sylvia (Birds)
Body covering (Anatomy)
Issue Date: 1980
Publisher: Malta Ornithological Society
Citation: Gauci, C., & Sultana, J. (1980). Moult of the Sardinian warbler. Il-Merill, 20, 1-13.
Abstract: The Sardinian warbler Sylvia melanocephala is a very common breeding resident in the Maltese Islands. It frequents most habitats including urban gardens. Formerly it was a winter visitor only, but became established as a breeding resident at the end of the last century (Sultana et al. 1975l. However, there are still indications of influxes in late autumn and winter (Sultana & Gauci 1976) and also evidence of spring passage in some years (Gauci & Sult~na 1978l. Between the years 1974 and 1978, 511 moult cards (158 for adults and 353 for juveniles) were filled in by the authors for the MOS Ringing Scheme- Valletta. Moult was recorded following the criteria used in the moult enquiry of the British Trust for Ornithology, as described by Snow (1967). A score of 0 was allotted to an old feather, 1 to a feather missing or in pin, and 2, 3 and 4 to feathers up to one-third, two-thirds and nearly fully-grown respectively. New fully-grown feathers were givenescore of 5. Fully-grown feathers still having a sheet of wax at the base have been scored as 4. Adult post-nuptial moult and post-juvenile moult are described separately. As will be seen later, a high percentage of adult birds were trapped when the primary score had already advanced to tw~nty or more. This bias is due to two factors: Little ringing was done in June and July; also, birds are much less active in the early stages of moult.
Appears in Collections:Il-Merill : issue 20 : 1979
Il-Merill : issue 20 : 1979

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