A trait‐based framework for understanding predator–prey relationships: Trait matching between a specialist snake and its insect prey

摘要: High‐quality information on predator–prey relationships is fundamental in understanding food webs, community assembly and ecosystem functioning. Recent analytical advances have made it possible to develop new trait‐based approaches study trophic evaluate trait matching between predators prey. Here, we a novel approach based generalized linear mixed‐effects models (GLMM) test the importance of prey availability identify set traits that best explain occurrence number predator's diet. We demonstrate by using an extensive dataset availability, gut content collected all known populations Vipera graeca, little‐known, endangered snake alpine grasslands Pindos Mountains Balkan Peninsula. show V. graeca unique, venomous specialized bush‐crickets grasshoppers (Orthoptera). Prey selection GLMMs showed ideal abundant, large‐bodied, has poor escape abilities (flightless, slow‐moving bad jumper) prefers loose (as opposed bare ground/rock or closed sward). Vipers restrict their feeding periods high Orthoptera abundance late summer need reach certain body size become able catch large‐sized Our provides framework for unprecedented fine‐scale specialist predator. The narrow niche likely increases vulnerability this cold‐adapted extinction. A free Plain Language Summary can be found within Supporting Information article.