Petronella, the little animal researcher, is making extraordinary discoveries again! With childlike sharpness, she examines both small and large creatures. Petronella lets chickens winter with her, saves a queen bee, and surprises her parents with crickets in the living room. Can leeches help with knee pain? And where does a mole actually have its ears? There’s always something happening with Petronella! Her dog Kordel and friend Claudia are, of course, along for the adventure.