April 1956 – vol. 49, issue 4–139 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 (68Â° 2 1 ' N . , 18Â° 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... This article is only available to registered users.To read more, please log in or purchase a subscription.