How many species of birds are extinct?
Likewise, what species of birds are extinct?
Regarding this, how many species of birds are there 2019?
Most checklists used by bird watchers as well as by scientists say that there are roughly between 9,000 and 10,000 species of birds. But those numbers are based on what's known as the “biological species concept,” which defines species in terms of what animals can breed together.