BYE BYE BIRDIE The last dusky seaside sparrow (one shown) living in captivity died in 1987, nearly 20 years after scientists warned the species was in danger.
U.S. Fish and Wildlife Service
BLEEDS GREEN The few lizards with green blood, such as this green skink from Papua New Guinea, may have acquired the coloring via a spotty pattern of evolutionary history. Their muscles, bones, tongues and gums also look greenish.