Bibliography on birds of prey and owls in Slovakia. Part 4. Order Strigiformes, genera Tyto, Otus, Bubo, Strix, Surnia, Glaucidium, Athene, Aegolius & Asio

The aim of the bibliography is to provide a list of publications on raptors and owls of Slovakia as well as papers of Slovak authors on these birds. The first three parts focused on genera from orders Accipitrifromes and Falconiformes is followed now by the fourth part focused on genera from Strigiformes order. In total 392 citations are listed - 242 (61.7%) scientific and research articles, 59 (15.1%) popular articles, 21 (5.4%) qualification papers, 45 (11.5%) conference abstracts and 25 (6.4%) reports or other papers. The register of species, objective index and the author register enable better overview.