Evolution of the Swiss bee database over time, showing the number of occurrences (blue) and the number of sampled 1 × 1 km-quadrates (number of quadrates with at least one bee observation).

  Part of: Praz C, Müller A, Bénon D, Herrmann M, Neumeyer R (2023) Annotated checklist of the Swiss bees (Hymenoptera, Apoidea, Anthophila): hotspots of diversity in the xeric inner Alpine valleys. Alpine Entomology 7: 219-267. https://doi.org/10.3897/alpento.7.112514