Photo by @anandavarma. Dr. Chris Clark weighs a Cuban Bee Hummingbird. This bird is not dead! Hummingbirds get confused when they are upside down and they hold still for a couple of seconds before flipping over and flying away. Chris is using this brief window to get a precise measurement of the bird's weight. You can see on the scale that this male weighs just 1.834 grams! That makes it the smallest species of bird in the world. Check out the story in the July issue of natgeo to learn more about hummingbirds. Check out @anandavarma to see another way to get a sense of how small bird this is.