Final answer:
Colombia is the country where the national bird is the Condor, which is significant to various indigenous cultures in the Andean region.
Step-by-step explanation:
Among the countries of Ecuador, Peru, and Bolivia, which all have a significant indigenous population that speaks various languages, the national bird that is the Condor is found in Colombia (D). These countries make up the heart of the Rural Amerindian Region in South America and share the Andes mountain range. While the condor is revered in Andean culture across multiple countries, it is specifically designated as the national bird of Colombia.