Which historical synonym mentioned might have previously been used for *D. exulans* but now refers to the Grey-headed Albatross?
Diomedea chrysostoma
In the complex landscape of taxonomy, synonyms represent names applied to a species historically that are no longer considered valid for that organism, often due to reclassification based on modern data. The text points out a specific instance of potential historical confusion involving *Diomedea exulans*. The name *Diomedea chrysostoma* was sometimes used in older literature in contexts that might have included the Wandering Albatross. However, currently, *D. chrysostoma* is recognized separately as the Grey-headed Albatross. Researchers must consult authoritative databases like WoRMS to ensure they are using the currently accepted binomial nomenclature, *Diomedea exulans*, and not falling into traps set by these historical aliases.
