Nesting behaviour of Osmia pilicornis (see Table 2): 15–16 Females of nests 1 and 4 tunneling out burrows in dead branches 17–18 Females of nests 2 and 4 transporting small leaf fragments of Fragaria vesca to build brood cell partitions and nest plug 19 Female harvesting nest-building material on a leaf of Fragaria vesca 20 Female of nest 4 returning from a foraging flight with pollen-filled metasomal scopa.

 
 
  Part of: Prosi R, Wiesbauer H, Müller A (2016) Distribution, biology and habitat of the rare European osmiine bee species Osmia (Melanosmia) pilicornis (Hymenoptera, Megachilidae, Osmiini). Journal of Hymenoptera Research 52: 1-36. https://doi.org/10.3897/jhr.52.10441