We're talking about barn swallows, infamous for their mud nests above doorways and for transforming front porches into bathrooms. "They don't fly off, they don't go use the bathroom. They use it ...

But there is also a large group of wasps who gather up mud. In this video, a potter wasp makes its nest and then seals in a paralysed caterpillar. The wasp's larva will consume the victim as it ...

Photo from Chun-Fu Lin via Lin, Chang, Matsui, Shen, Tominaga and Lin (2025) In a wetland of central Taiwan, a “slender” creature poked its “triangular” head out of a mud nest and made an ...