Bird evolution is a fascinating process that traces back to small, feathered dinosaurs known as theropods. These creatures lived during the late Cretaceous period, around 150 million years ago. Over time, some theropods developed feathers, which initially may have been used for insulation or display rather than flight. Eventually, these adaptations led to the emergence of the first true birds, such as Archaeopteryx, which exhibited both dinosaur and bird characteristics. As birds evolved, they adapted to various environments, leading to the diverse species we see today. Key adaptations include the development of lightweight bones, specialized beaks, and efficient respiratory systems. This evolutionary journey has allowed birds to thrive in nearly every habitat on Earth, showcasing their remarkable ability to adapt and survive.