From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

Peru draws tourists eager to explore the remnants of South America’s ancient civilisations. There’s much to uncover in this ...

科学家们首先佩戴独特的面罩诱捕了这些鸟类，随后将其标记释放。他们观察到，“记仇”的短嘴鸦会持续用刺耳的声音“责骂”并围攻佩戴同样面罩的人，不论他们的体型、年龄、性别或步态如何。与此同时，卸下伪装、不再佩戴该面罩的真正捕鸟者却很少受到围攻。