BITING PESTS is a term used to describe small insects that bite humans and animals. Mites are arachnids, related to spiders, that feed on the blood of their hosts. They are usually found in warm, humid environments and can cause skin irritation and allergic reactions. NOSEEUMS are tiny, biting flies that are found in tropical and subtropical climates. They are known for their painful bites and can cause skin irritation and allergic reactions.