He also needs to stay on the lookout for predators.

Animals that can do two important things at the same time, like eat and watch for predators, would be better off, she said.

As the population expands, there is more food available for predators.

I kept looking for predators, and finally asked if he'd spotted any.

Different calls may be used for predators on the ground or from the air.

On them you set boys, easy targets for such predators.

They provide food for predators, but are considered pests by some.

This may make the nests hard for predators to find.

"We are not in the business of growing livestock for predators," he said.

It is an effective strategy, at least for predators with a short reach.