The bugs in the clip appeared to be mold mites — the common name for a range of species that infest humid environments.

The milky specks known as hummingbird mites are among the most skilled hitchhikers in the world. They live their lives inside ...

But the poppy-seed-size mites are basically blind and can’t jump, said Carlos Garcia-Robledo, a biologist at the University of Connecticut. How do they sense the bird’s presence and attach to ...