They dont have the ability to pick up dinos, but, they can go extremely fast, especially when inprinted when swooping. If you want a fast flyer with a decent amount of weight and fairly high stamina, this is the one you've been looking for.
The Snow Owl’s healing ability is really good for farming blood packs. Just use the syringe as much as you can, then jump on the owl and heal. Bring a lot of food as the healing drains your hunger a lot.