Solitary bee populations support healthy ecosystems, with bee hotels providing nesting habitat but requiring informed management to genuinely benefit rather than harm resident species.
Solitary bee welfare through bee hotel provision represents an area where good intentions can cause welfare harm if implementation is uninformed. Well-designed and well-maintained bee hotels provide genuine welfare benefit by supplementing declining nesting habitat, enabling mason and leafcutter bees to complete their life cycles in areas where hollow stems and soft mortar have become scarce. However, poorly designed commercial bee hotels - with tubes too short, too wide, or made of inappropriate materials - either fail to attract bees or, worse, create conditions where parasitic mites and wasps can access nests more easily, causing larvae to die before emergence. Bee hotels that are not replaced annually accumulate mite infestations and fungal pathogens in used tubes, turning a welfare intervention into a welfare harm. The welfare benefit of bee hotels is maximised by using appropriate tube dimensions for target species, providing fresh tubes annually, positioning hotels correctly (south-facing, sheltered, near diverse flowers), and supplementing with soil and sand patches for ground-nesting species that hotels cannot serve. The individual nature of solitary bee welfare - each nest cell containing a single larva provisioned with pollen by one parent - makes protection of individual nesting attempts meaningful in a way that differs from social insect welfare.