Birds have developed wings that ____ them to fly high in the sky. Many modern birds are ____ strong muscles that help them stay in the air. Some species of birds are ____ at catching fish while flying above the water. The long migrations of some birds require adaptations to ____ their energy needs ____ is important for animals that need to change their way of flying as they evolve.capability Skill The ____ of birds to fly has fascinated scientists for many years. ____ species of birds had different body structures compared to those we see today. Animals continue to ____ their flight abilities to survive in changing environments. One interesting ____ of some birds is their colorful plumage that helps attract mates. Birds ____ their wings quickly to gain speed before taking off into the air. The process of ____ allows birds to travel great distances in search of food. Birds ____ gracefully through the air, using thermals to save energy while flying. The ____ bones of birds make them lighter and more suited for flying. Some birds have a ____ wingspan that affects how well they can soar. The ability to ____ high in the sky helps birds spot prey from far away. A bird's ____ is an important factor in determining how efficiently it can fly Certain birds exhibit a large ____ which helps them glide on warm air currents.

Unit 5

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