The term 'Little Bloodsucker' can be summarized by two crossword solutions: LEECH (5 letters) and TSETSE (6 letters). Leeches are small, segmented worms that feed on the blood of other animals. They are found in freshwater environments around the world and have been used in medicine for centuries. TSETSE flies are a species of biting fly found in Africa. They are known for transmitting sleeping sickness to humans and animals.