Abstract:

Aims: Global biodiversity is under serious threat due to the intensification of climate change and human activities in the ecosystems. As a result, governments and the public are increasingly focused on implementing measures to mitigate biodiversity loss. In recent years, insect hotels have emerged as an innovative approach to biodiversity conservation in urban park management, attracting significant attention and being gradually adopted. The primary purpose of insect hotels is to provide breeding, nesting, and overwintering sites for insects—particularly solitary bees—in urban environments. By doing so, insect hotels contribute to maintaining species diversity and population stability. However, a comprehensive understanding regarding of the effectiveness and challenges of insect hotels in conserving urban insect diversity is still lacking. 

Progresses: To address this, we review the global research status of insect hotels, including aspects such as the number of studies, geographical distribution, targeted species, and the materials and specifications of nesting tubes. 

Prospects: We summarize the positive impacts (pollination, pest control, and popular science education) and limitations (low occupancy rate, invasive alien species, increased harm from natural enemies and pathogens) of insect hotels in promoting solitary bees diversity in urban environments and propose specific improvement strategies. This study aims to provide a scientific foundation and practical guidance for sustainable development of urban biodiversity.

Key words: insect hotels, trap-nests, urban insects, solitary bees, diversity conservation