Mottled duck / Floridaente (Anas fulvigula)

Says mottled ducks near Mark's place in St Petersburg - they resembled female mallards but darker, males have yellow bills, females they call olive but pictures show orange and brown too. 2023-09-25 09:52:18 Florida NIKON D5600 ISO 450
Exposure 1/1000
Classification: Genus Ducks (Anas); Tribe Dabbling ducks (Anatini); Subfamily Dabbling ducks plus extinct (Anatinae); Family Waterfowl (Anatidae)
General: The mottled duck (Anas fulvigula)^{[note 1]} or mottled mallard is a medium-sized dabbling duck. It is intermediate in appearance between the female mallard and the American black duck. It is closely related to those species, and is sometimes considered a subspecies of the former, but this is inappropriate (see Systematics below). [more]

Only documented observation: 2023-09-25