T H E following' observations on the breeding" biology of the Redspotted Bluethroat (Cyanosylvia s. svecica) were made at Abisko in Swedish Lapland from 14th June to 4th July, 1955. Abisko (68° 2 1 ' N . , 18° 49' E.) is situated at the mouth of the Abiskojokk River and beside Lake Tornetrask. Although the data collected are far from complete, the fledging- and incubation-periods having been det...
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