They have a Streamline shape, wings ,feathers and hollow bones.
by blending in with their environments and follow their instincts or actions.
The micro frog adapts to their environment in a number of ways. They must first adapt to the climate for example.
The sympathetic nervous system prepares the body for fight or flight responses, while the parasympathetic nervous system helps the body rest and digest.
Observation of the natural world around him. He was fascinated with the flight of birds and the order found in nature. Exceedingly curious he looked for ways to mimic actions in the natural world.
If I'm understanding the question correctly, then birds have a number of ways that their bodies have adapted to allow for flight. Some of these would include hollow bones, an enlarged breast bone, rigid skeleton, beaks instead of jaws (less heavy than jaws), and feathers (allows for a more streamlined body). Flying takes a great deal of energy, which means that birds have a very high metabolism. This leads to a great deal of their time not flying spent eating in an attempt to get enough energy to allow for more flight.
That penguins can't fly but other birds can
Yes, in some ways birds are very similar to mammals. In others, they differ completely.
it can kill birds and other animals
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Birds behave very quite. They sing or whissle most of their time, they're not that unusual when they communicate though. Birds are all unique in there own different ways.
Yes, indeed, in many ways.
They lay eggs and eat worms.