Bee hotels are increasingly set up by land managers in public parks to promote wild bee
populations. However, we have very little evidence of the usefulness of bee hotels as tools
to help the conservation of wild bees within cities. In this study, we installed 96 bee hotels in
public parks of Marseille (France) for a year and followed their use as a nesting substrate by
the local fauna. The most abundant species that emerged from bee hotels was the exotic
bee species Megachile sculpturalis, representing 40% of all individuals. Moreover, we only …