吸血蝠是唯一以哺乳动物血液为食的蝙蝠种类。

The ___Desmodus is the only bat species that feeds exclusively on the blood of mammals.

研究人员发现吸血蝙蝠的行为包括夜间捕食和特殊的血液消化系统。

Researchers found that ___desmodus behaviors include nocturnal hunting and specialized blood-digestion systems.