Ants in the pants drive away birds

Supercolonies of invasive insects spoil avian picnics on Christmas Island

Dubbed “yellow crazy ants” by people, an invasive ant drives birds crazy too.

BERRY PICKING A native bird called the Christmas Island white-eye (left) doesn’t feed on as many berries as usual when invasive yellow crazy ants swarm over plants. Researchers measured this anti-fruit effect by setting out artificial berries and checking for pecks by a thrush (top) and white-eye (bottom).