2021年5月19日 - EN

More than a billion sparrows in the world, study finds St Ives: Man builds raft to save 'unluckiest' swan and eggs Rare white-tailed sea eagle brought to Isle of Wight 50 billion birds on Earth, varying impact of climate change and more: Latest bird research World is home to 50bn birds, 'breakthrough' citizen science research estimates Securing a swift return: how a simple brick can help migratory birds Country diary: two scratchy fiddles are music to the ears We used drones to track the feeding habits of seabirds - new research There are 50 billion wild birds on Earth - but four species dominate - The Hack Posts Scientists did a bird census Soaring populations put four species in 'billion bird club'