Why did it take nearly 250 years for the bald eagle to be declared America's national bird?

The bald eagle has symbolised American strength and freedom for nearly 250 years, its image emblazoned on the Great Seal, military emblems, and currency. Yet, it wasn’t until Christmas Eve 2024 that it was officially designated the United States' national bird

Why did it take nearly 250 years for the bald eagle to be declared America's national bird?
The bald eagle has symbolised American strength and freedom for nearly 250 years, its image emblazoned on the Great Seal, military emblems, and currency. Yet, it wasn’t until Christmas Eve 2024 that it was officially designated the United States' national bird