Incubation lasts 26 to 28 days. Care for the ducklings similar to Mallard. Much like the previous subspecies, the Hawaiian Duck is restriced to Kauai the in Hawaiian Island. They were once found on all main islands, but are now very rare. Both sexes are similar to a Mallard hen, with the males having a darker head and neck feathers.
Hens are darker than a Mallard hen.
I don't have any information about their captive status. The mexican Duck resmbles a Mallard hen and are similar in size. It is native to most of Mexico and a few maybe seen in the Rio Grande Valley in New Mexico. Many of the Mexican Ducks north of the Rio Grande have crossed with platyrhynchos , that there are very few pure diazi north of Mexico. I have found sources that call this duck the Mottled Duck and that it is a seperate species.