"I had to have a closer look," he said. In his latest study, which he led with Sándor Zsebők, also at the Max Planck Institute for Ornithology, Dr. Greif flew greater mouse-eared bats, a European species that often lives near humans, around a dark, rectangular flight tunnel.
I'm on the line with Erica Quinzel, lead animal care specialist for Bat World Sanctuary, as she climbs over a rocky incline to check to check a bridge in downtown Houston over the Buffalo Bayou river for surviving or injured bats.
As Houston residents walks across the Waugh Bridge in the wake of Hurricane Harvey they were met with a startling sight - hundreds of dead and struggling bats floating in the water below. The bridge, a popular tourist destination in the city, is known for the estimated 250,000 Mexican free-tailed bats that live underneath it.