Biting flies are insects known for their painful bites, which they use to feed on the blood of animals and humans. Common types include horseflies, deer flies, and stable flies. These flies are typically found in warm, humid environments and are most active during the day. Their bites can cause irritation, allergic reactions, and in some cases, transmit diseases. Biting flies are attracted to carbon dioxide and body heat, making them more likely to target people and livestock. Effective control measures include using insect repellents and wearing protective clothing to minimize exposure.