A national emblem is a symbol that represents a nation. It may or may not appear on the national flag. It is usually something from the natural world, eg. an animal or bird, but can be any object.
The official national emblems of nations of the world in alphabetical order :
... particularly zealous – and successful - adversary was Abwehr sergeant Hugo Bleicher[?]. He dismantled Interallie[?] intelligence network and personally arrested ...