Smallest Bird

The smallest birds in the ornithology collection are the hummingbirds. Rufous Hummingbirds (Selasphorus rufus) only weigh two to five grams, and have a wingspan of about 10 centimetres. Every year, they migrate between Alaska and Mexico, up to a 6,400-kilometre journey each way. Given how small they are, we can appreciate how much energy it…