Fungal fight club

DRAWING THE LINE  A lion’s mane fungus (Hericium erinaceus) roars out territorial challenges via silent chemical secretions. Battle lines between fungi can appear as dark streaks inside logs.

Lebrac/Wikimedia Commons

Battles between mushrooms don’t make a sound, but they’re violent. “Good fighters can kill the less-good ones and take over their territories,” says mycologist Lynne Boddy of Cardiff University in Wales.