Properties of Metalloids-What are the Physical Properties of Metalloids? What are the Physical Properties of Metalloids? The Physical properties of Metalloids are the characteristics that can be observed without changing the substance of the elements in a group into other substances.hat are the Physical Properties of Metalloids? The Physical properties of Metalloids are the characteristics that can be observed without changing the substance of the elements in a group into other substances.
Quick Answer. Hummingbirds fly backwards, and they are the only birds capable of doing so. When using this unique ability, hummingbirds may reach speeds of 25 to 30 mph as they go. These birds have flexible wings that they can rotate in swift circles to help fly in reverse.
They can fly fast, up to 60 km (37 mi) per hour, which is an amazing feat for an insect, but also slowly, backwards (the hummingbirds are the only other species that can do this) and forwards; they can even copulate in the air while hovering, like the kestrels do. Their wings have a rhythm of 20-30 beats per second.