The Somali ostrich, Struthio molybdophanes, is listed as “vulnerable” by IUCN.WIKIMEDIA, DONNA BROWN Species within the “Goldilocks zone”—neither too big nor too small—have the lowest risk of extinction, while very large and very small animals are at greatest risk, according to a study published yesterday (September 18) in PNAS. “Surprisingly, we found that not only the largest of all … Continue reading Largest and Smallest Animals At Highest Risk of Extinction, Study Finds