Reichsadler is a special kind of bird that has a very important meaning in the history of Germany. It looks like an eagle, but it's not a real bird that you can see flying around outside.
Back in the old days, when Germany was still divided into many different kingdoms and regions, each of these places had their own symbol to show who they were. But then, when all of these regions came together to form one big country, they needed a new symbol that would represent all of them together.
That's where the Reichsadler comes in. It was chosen as the new symbol because it was strong and powerful, just like the country of Germany. It has two heads and big wings that make it look like it could fly really high and far.
The Reichsadler was used as the official symbol of Germany for many years, but during World War II, it became associated with some very bad things that happened during that time. After the war was over, Germany decided to use a different symbol instead.
Even though the Reichsadler isn't used as the official symbol of Germany anymore, it's still an important part of the country's history and culture.