The aim of the investigation was to establish the arthropod fauna of bird nest boxes. Boxes
that are used for only sleeping and for egg laying were sampled. These latter are considerably more complex and might consist of mosses, grasses, feathers, mammal hairs, twigs,
small branches, pieces of rope and plastics. The nests were grouped according the feeding
habits of the birds: seed-eaters, insect-eaters and owls. After the breeding season, nests
were removed and put into sample bags. The arthropods in these bags were killed by ethyl
acetate. In total, 904 identified specimens belonging to fourteen arthropod orders were collected. The ecology of the species is shortly discussed. The collected arthropods have different interactions with the bird and each other. Some feed on the bird, some are brought into
the nest to feed the young birds, some feed on nesting material and/or on remains of food
for the young birds some feed on other arthropods present in the nest, and some use the
nest as a hiding place.
Dermestidae found: Anthrenus spec., Megatoma undata, Agriotes sputator, Dermestes haemorrhoidalis, Dermestes lardarius.