📜 Home to a quarter-million Mexican free-tailed bats. 🔍 Witness spectacular 'batnadoes' at dusk. # Why Go 🦇 Observe large colonies of Mexican free-tailed bats 🌅 Experience unique 'batnadoes' at sunset 🌉 Learn about the Yolo Causeway's ecosystem 👪 Family-friendly viewing, children under 15 free on tours # Why Avoid ⚠️ Popular tours sell out extremely fast # Tips 🚗 Park outside Yolo Bypass Wildlife Area gates, view from levee. 🗓️ Best viewing June through September. # Cost 💰 Tours cost $14 per person, children under 15 free. # Hours 🕒 Nightly flights at dusk, tours run June through September.