Complex sentence: They will then drag the prey up onto a twig or a piece of grass, or will sometimes fly the insect to a different location; they do this in order to keep ants or other insects from stealing their prey.
Split into simpler sentences: They will then drag the prey up onto a twig or a piece of grass, or will sometimes fly the insect to a different location. They do this in order to keep ants or other insects from stealing their prey.