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We present a summarization of an overview of hippoboscid flies parasitizing bird hosts in Slovakia. Six new host associations are presented in this paper: Lipoptena fortisetosaMaa, 1965 collected on Certhia familiarisLinnaeus, 1758 and Sylvia atricapilla(Linnaeus, 1758), Ornithomya bilobaDufour, 1827 collected on S. atricapilla, Ornithomya chloropus(Bergroth, 1901) collected on Anthus trivialis(Linnaeus, 1758), and Ornithomya fringillinaCurtis, 1836 collected on Phylloscopus collybita(Vieillot, 1817) and A. trivialisare recorded for the first time from Slovakia.

Sexual size dimorphism (SSD) of the fat dormouse Glis gliswas evaluated on five somatic variables (head-and-body length, tail length, hind foot length, ear length and body weight) in 40 specimens. The overlap of values of the measured traits between the sexes was high, and females seemed to exhibit slightly higher mean values than males. However, these differences were non-significant, and together with the results of discriminant function analysis they supported monomorphism in the evaluated species. Positive correlation analyses, together with PCA values, confirmed that tail length and hind foot length are traits which play a significant role in overall variability. We speculated that this relationship could explain their mutual importance in locomotion in the three-dimensional space of tree canopies. Our results suggest that the non-significant results regarding SSD provide the benefit of the same size for both sexes in inter- and intra-sexual interaction and may be connected with passive mate-guarding.