query: How many species of birds are there?
passage: List of birds
The passerines (perching birds) alone account for well over 5000 species. In total there are about 10,000 species of birds described worldwide, though one estimate of the real number places it at almost twice that[1].
passage: List of birds of Cape Verde
This is a list of the bird species recorded in Cape Verde. The avifauna of Cape Verde include a total of 187 species, of which four are endemic, three have been introduced by humans and 75 are rare or accidental. One species listed is extirpated in Cape Verde and is not included in the species count. Four species are globally threatened.