The "Ptaki Śląska – Birds of Silesia" is an international scientific journal published annually by the Upper Silesian Ornithological Society. The journal is issued since 1982, previously under the title „Dolina Baryczy – Barycz Valley” (1982-1984), essentially in Polish with English abstracts and keywords. The papers may be published also in English, German and Czech languages. The "Ptaki Śląska – Birds of Silesia" publish original ornithological papers on biology, ecology, migration, abundance and distribution of wild birds (especially in Silesia), methodical articles, materials, short reports (notes), obituaries, reviews and reports. All papers are double-blind peer-reviewed. The journal is indexed in Zoological Record and AGRO.