File:An-Unprecedented-Role-Reversal-Ground-Beetle-Larvae-(Coleoptera-Carabidae)-Lure-Amphibians-and-Prey-pone.0025161.s009.ogv

English: A rare case where a Pseudepidalea viridis metamorph successfully swallowed an Epomis circumscriptus larva, but after ca. two hours, regurgitated it and was ultimately consumed by the larva. In the beginning of this interaction the amphibian failed to eject the larva from its mouth despite repeated efforts. The larva's body, which was partly outside the amphibian's mouth, was stained with blood, evidence of injury inflicted upon the amphibian. Eventually the larva was swallowed completely and was seen moving inside the amphibian's stomach until it was finally regurgitated two hours later. The larva was covered with mucus, positioned sideways and motionless, but otherwise seemed unharmed. When the amphibian moved and was positioned above the motionless larva, the latter suddenly responded by springing to life, grasping the amphibian's venter.