tell me facts about birds

1. There are over 10,000 different species of birds worldwide, ranging in size from the tiny hummingbird to the ostrich, the largest bird on Earth.

2. Birds are the only animals with feathers, which are designed for flight, insulation, and attracting a mate.
3. Birds have hollow bones, which makes them lightweight and helps them fly.
4. Birds have a unique respiratory system that allows them to take in oxygen both when they inhale and exhale, which is why they can fly at high altitudes.
5. Birds have excellent eyesight, with some species able to see ultraviolet light and others able to see in the dark.
6. Many birds migrate annually to escape harsh winter conditions and find better food sources, traveling thousands of miles in some cases.
7. The average lifespan of a bird varies greatly depending on the species, with some living only a few years and others living for several decades.
8. Some birds, like parrots and crows, are known for their intelligence and ability to solve complex problems.
9. Birds play a crucial role in ecosystems as pollinators, seed dispersers, and pest controllers.
10. Birds have been domesticated and kept as pets for thousands of years, with parrots, canaries, and budgerigars being among the most popular pet bird species.