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Find out more about the ups, downs and sideways of the world's smallest bird.
• Hummingbirds are only found in North, Central and South America.
• There are over 325 species of hummingbirds, making them the second largest bird family in the world, second only to flycatchers.
• Hummingbirds weigh 1/10th of an ounce; about the weight of a penny.
• Hummingbirds' brains are about the size of a BB.
• Hummingbirds' hearts are larger proportionally to their body than any other bird or mammal.
• Hummingbirds have such underdeveloped legs that they are unable to walk well.
• Hummingbirds' nests are about the size of a golf ball; around 1 ½ inches in diameter.
• Hummingbirds learn to associate flower colors, like red, with food. They do not have an innate preference for red.
• Hummingbirds can drink up to twice their body weight in nectar every day (most birds only eat ¼ - ½ their body weight).
• Hummingbirds can extend their tongue approximately a distance equal to the length of their bill.
• While lapping up nectar, Hummingbirds can move their tongues in and out of their bill at a rate of up to 12 times a second.
• Female Hummingbirds' tongues are longer than the males.
• Hummingbirds can fly up to 60 miles per hour, but typically fly at 30-45 miles per hour.
• Hummingbirds can hover and are the only birds able to fly backwards and upside down.
• Their wings beat 20-80 times per second.
• During the night, Ruby-throated Hummingbirds can enter into a state of torpor to save energy. Similar to a type of short-term hibernation, torpor reduces their metabolic activity and drops their heart rate from 1,200 beats per minute to 50 beats per minute.