D. variabilis

D. variabilis may refer to:
 * Dalaca variabilis, a moth species found in Chile
 * Dendrobates variabilis, a frog species endemic to Peru
 * Dermacentor variabilis, the American dog tick, a tick species found in North America
 * Diplolepis variabilis, a plant species in the genus Diplolepis
 * Donax variabilis, a mollusc species found on the east coast of the United States from Virginia to the Caribbean