Exciting news! With our new Ad-Free Premium Subscription you can enjoy a distraction-free browsing experience while supporting our site's growth. Without ads, you have less distractions and enjoy faster page load times. Upgrade is optional. Find out more here, and enjoy ad-free learning with us!

prey

Hi there,
Please help with the following:

Wolves' prey is usually bird OR birds.

Thanks
Joe

Joe, it's birds.