Source: https://www.researchgate.net/profile/Jie_Ma12/publication/233607623_Seasonal_variation_in_prey_abundance_influences_habitat_use_by_greater_horseshoe_bats_Rhinolophus_ferrumequinum_in_a_temperate_deciduous_forest/links/5602b4af08ae849b3c0e25de/Seasonal-variation-in-prey-abundance-influences-habitat-use-by-greater-horseshoe-bats-Rhinolophus-ferrumequinum-in-a-temperate-deciduous-forest.pdf