I enjoy wildlife photography as a hobby, and not necessarily a birding expert. However I generally know my ducks, but this one has me stumped. It looks like a black duck except the white chest. I have seen a lot of mallard/black duck hybrids around lately, but not colored like this.
This Forum is specifically not for soliciting help with identifying a photo: that’s what iNat itself is for. Post the photo on inaturalist.org and our community will be able to take a look and provide feedback. :-)