What's a royalty-free license? Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional ...

Choose from 37,476 Oak Tree stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else.

African wildlife expert Rob the Ranger observes a lion pride resting in the shade of acacia trees in Maasai Mara.

How to Draw a Tree David LaRochelle, illus. by Colleen Muske. Minnesota Historical Society, $18.95 (32p) ISBN 978-1-68134-321-1 ...

This area has few hills but plenty of flat, grassy plains covered with countless huisaches (acacia trees) and nopales (cactuses). The typical elevation is around 2,000 meters.