Des Moines Register As dusk descended on Gray’s Lake park in Des Moines, Kavya Parsa pulled a pair of fuzzy brown bats out of a plastic ice cream bucket and placed them onto the bark of a hearty cottonwood tree near the edge of the lake. The bats, two of the 18 released back into the wild on Wednesday, sprang from the tree and took flight. After a long year of helping care for the tiny mammals, Parsa, a lawyer and volunteer at the Iowa Wildlife Center in Ames, beamed with joy as the bats navigated their way into the darkening sky.