’40 bird families with flightless species existed before human-led extinctions’

Scientists have said at least 40 bird families with flightless species roamed the Earth before a vast majority of them went extinct due to human-driven pressures (Ben Birchall/PA)
Scientists have said at least 40 bird families with flightless species roamed the Earth before a vast majority of them went extinct due to human-driven pressures (Ben Birchall/PA)