The Eagle is associated with masculine energy and focus of the mind. The eagle is symbol of courage, wisdom and strength. It’s sacred because it can fly the highest and therefore closest to Spirit.
The bird that embodies joining heart and mind, male and female, some also see it as the offspring of other two.
The Maya acknowledged it as an embodiment of freedom. As quetzals usually don’t survive in captivity, they communicate that they would rather transcend than be held back.
Indigenous people consider the condor sacred, hence there are various stories connecting it with the creation of life on Earth. The Condor was and is still admired as a symbol of power and majesty.