Siberian chiffchaff to be a full species due to its distinctive plumage and vocalisations, being similar to "P. s. sindianus" in these respects. Common chiffchaffs (of the nominate race) and Siberian chiffchaffs do not recognize each other's songs. Pending resolution of the status of the form "fulvescens", which is found where the ranges of common chiffchaff (of the race "abietinus") and Siberian chiffchaff connect and may or may not be a hybrid between these, "tristis" is maintained in "P. collybita" by most checklists. Siberian chiffchaff Siberian chiffchaff ("Phylloscopus (collybita) tristis") is a leaf-warbler which is usually considered a subspecies of the common
Sophie van der Does de Willebois der Does purchased a local factory in maiolica. After the death of her husband, one year later, she worked with the Italian Luigi de Lerma in the firm. Van der Does abolished the company in 1928, and moved with the children to the Netherlands. Lerma became the director of "Ceramica Icara" on Rhodes. In 1930 Van der Does moved to Rhodes, where she married De Lerma. In 1934 the family settled in back in the Netherlands in Groenekan, where she and her husband started a pottery. They specialized in decorated dishes with fish, birds and plants. Van der Does also