Which of these examples is cited as a recognized subspecies within *D. exulans* by Avibase?

*D. e. antipodensis*

Avibase details several recognized subspecies that fall under the umbrella of *Diomedea exulans*, reflecting close genetic links and shared ancestry despite geographic separation. Specific examples listed include *D. e. antipodensis*, *D. e. gibsoni*, and *D. e. chionoptera*. These populations breed on geographically isolated island groups within the Southern Ocean. The distinction between these subspecies often hinges on subtle yet consistent differences in feather coloration, such as the degree of dark feathering on the upper wings or body. Although ongoing taxonomic debate might elevate some of these to full species status if reproductive isolation is confirmed, their current inclusion under *D. exulans* signifies they are considered variations of the parent species.