Central America consists of seven countries: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama. It is part of the Mesoamerican Biodiversity hotspot, boasting 7% of the world's biodiversity. As a bridge between North and South America, Central America has many species from the Nearctic and the Neotropic ecozones. However the southern countries (Costa Rica and Panama) of the region have more biodiversity than the northern countries (Guatemala and Belize), meanwhile the central countries (Honduras, Nicaragua and El Salvador) have least biodiversity. Mexico is occasionally considered part of Central America due to the language and cultural heritage it shares with several of the countries in the region.