Which animal is the heraldic animal of the Federal Republic of Germany?

EDITORIAL LEARNING AID

Why is this answer correct?

The heraldic animal of the Federal Republic of Germany is the eagle, which is also shown in the federal coat of arms. Lion, bear and horse are heraldic animals of other countries or cities, not of the federation.

Germany's heraldic animal is the eagle.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.