They feed primarily on rodents and birds. They feed mainly on smaller birds. When food is abundant, grizzly bears will feed in groups. So when they catch you, they feed you. Parents may accidentally feed their nestlings plastic, mistaking it for food. Triticale is useful as an animal feed grain. The mosquitos must feed on blood to lay eggs. We have a lot of mouths to feed. This suction is essential for babies to breast feed. Conversely, groundwater can also feed surface water sources. Northern pike also feed on insects, and leeches. Some whales lunge feed on bait balls. The brine shrimp feed on microscopic algae. This mimics that of a social media feed. However, if the water temperature exceeds , the turtle will not feed.