Osmia orientalis, a bee species native in Japan that make their nest inside empty snail shell
Figure 1. Osmia orientalis nesting in an empty shell of the snail Euhadra amaliae. (a) Female adult on a shell. (b) Larvae growing inside a shell. (i) Larvae. (ii) Pollen-nectar provision. (iii) Plug used to close the nest
u/Particular-Command49 — 6 days ago