生物学中的“动物学”选项为动物分类，生理学，解剖学和生态学提供了广泛的知识和经验背景。在鸟类学（鸟类研究），昆虫学（昆虫研究），哺乳动物学（哺乳动物研究），爬虫学（爬行动物和两栖动物研究），鱼类学（鱼类研究），无脊椎动物生态学方面提供高级课程。 ，海洋哺乳动物学，寄生虫学（寄生虫研究）和淡水生物学。
Biology is one of the most basic fields of science with direct application to humans. Our continued existence on planet Earth depends in large part on how we resolve problems of a biological nature. Biology is a broadly based discipline encompassing a variety of subjects ranging from medicine to ecology. The Biology program at WIU is designed to provide students with a broad exposure to the various areas of Biology.<br><br>Majors are offered in Biology (with options in Botany, Environmental Biology, Microbiology, Zoology, Medical Sciences, and Science/Biology Teacher Education) and Clinical Laboratory Science leading to a Bachelor of Science degree. Minors are offered in Botany, Horticulture, Microbiology, Middle Level Science Teaching, and Zoology.