What's the biggest group of animals ever recorded on Earth?
From expansive underground colonies, to glinting underwater shoals, vast cacophonous flocks, and cloud-blanketing swarms, these animals are top contenders for the title of the world's most numerous group.
From expansive underground colonies, to glinting underwater shoals, vast cacophonous flocks, and cloud-blanketing swarms, these animals are top contenders for the title of the world's most numerous group.
