- Blood-Sucking Bugs Ticks, Fleas, Bed Bugs, and Mosquitoes There are various types of insects we encounter in our day to day lives and some can be more harmful requiring certain types of treatment. For example, blood-sucking bugs are parasites that feed on human and other mammal hosts and have the potential to transmit disease. The most common types of blood-sucking bugs you should be on the lookout for are mosquitoes, ticks, fleas and bed bugs. #tobecontinued...