This page lists living orders and families of birds. The links below should then lead to family accounts and hence to individual species.
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.
Taxonomy is very fluid in the age of DNA analysis, so comments are made where appropriate, and all numbers are approximate. In particular see Sibley-Ahlquist taxonomy for a very different classification.Lists of birds by region
The following are the regional bird lists by continent. Some are full species lists, others, particularly continental lists, have just the families.
For another list see Category:Lists of birds by location