1: 1. Hummingbirds are the only birds that can fly backwards. 2. They can beat their wings up to 80 times per second. 3. Hummingbirds have excellent memory and can remember every flower they have visited.

2: 4. These tiny birds have the fastest metabolism of any animal. 5. They are able to go into a state of torpor to conserve energy. 6. Hummingbirds can weigh less than a penny.

3: 7. There are over 300 species of hummingbirds. 8. They can see ultraviolet light, helping them find nectar in flowers. 9. Hummingbirds have a unique courtship dance to impress mates.

4: 10. Some hummingbirds migrate up to 3,000 miles each year. 11. They have a specialized tongue to lap up nectar from flowers. 12. Hummingbirds have a heart rate of up to 1,260 beats per minute.

5: 13. These birds are known for their iridescent feathers that reflect light. 14. Hummingbirds have no sense of smell. 15. A hummingbird's brain makes up 4.2% of its body weight.

6: 16. They can drink up to eight times their body weight in nectar each day. 17. Hummingbirds are excellent pollinators of plants. 18. The average lifespan of a hummingbird is 3-5 years.

7: 19. Hummingbirds can fly up to 30 miles per hour. 20. They can hover in mid-air and fly backwards. 21. Hummingbirds have a lifespan of up to 10 years in the wild.

8: 22. Their wings create the signature humming sound as they fly. 23. Hummingbirds play a vital role in maintaining ecosystem balance. 24. They have a keen sense of hearing, allowing them to detect predators.

9: 25. Hummingbirds are found only in the Western Hemisphere. 26. They are attracted to bright colors, especially red. 27. Hummingbirds have a strong territorial instinct to protect food sources.