Nest parameters of Osmia uncinata. a) Trunk diameter at breast height of Pinus sylvestris trees selected as nesting site. b) Height of nest entrance above the ground. c) Exposure of nest. d) Length of nesting burrow. e) Number of brood cells. Grey = abandoned nests; blue = nests occupied upon discovery.

  Part of: Müller A, Prosi R, Taylor S, Richter H, Herrmann M, Weibel U (2020) Unique nesting biology of Osmia ( Melanosmia) uncinata, a Palaearctic osmiine bee specialized on thick-barked conifers (Hymenoptera, Megachilidae). Alpine Entomology 4: 157-171.