How does the breeding cycle of the Snowy Albatross (*D. antipodensis*) contrast with the classic Wandering Albatross behavior?

It has evolved to breed on an annual cycle.

One of the most significant points of contention in the species delimitation debate centers on reproductive timing, which suggests substantial ecological divergence between populations. The classic or traditional Wandering Albatross is documented as maintaining a biennial breeding cycle, meaning it nests only every two years. Conversely, the Snowy Albatross (*D. antipodensis*) has evolved a notably different reproductive strategy, engaging in breeding on an annual cycle. This difference in frequency implies differing ecological pressures; an annual breeder must return and reproduce quickly, potentially favoring more localized foraging, whereas a biennial breeder prioritizes survival and foraging efficiency over a longer gap between reproductive efforts.