AUTHOR=Gornall Lilian , Dauber Jens , Sickel Wiebke TITLE=Population delimitation in bumble bees - strategies and research gaps JOURNAL=Frontiers in Bee Science VOLUME=3 YEAR=2025 URL=https://www.frontiersin.org/journals/bee-science/articles/10.3389/frbee.2025.1507903 DOI=10.3389/frbee.2025.1507903 ISSN=2813-5911