This is another diver, but seems solitary, and doesn't, as a rule, mix well with other ducks, preferring to be aloof from other species. The drake (only), sure enough has a very faint ring around it's neck, but both the drake and 'duck' have definite band/rings around/near the tip of their beak/bill. Most hunters with savvy feel that the name 'ringbill' would be a more suitable name for this excellent bird. 

I have shot ringnecks decoying into bluebill and canvasback decoy spreads, but generally, they don't decoy readily to these other species 'blocks'. In wickedly inclement weather they may however, and - rules of thumb are difficult to prove in the duck shooting sports - just as in fishing. 

Ringneck ducks prefer to nest way up north on remote small lakes and ponds, and will raft up together in flocks of several hundred before flying south. They seem to stay in these units once established. These ducks are not what most would regard as a 'pretty' duck, being of greys and whites, with the pale ring around their (drake's) neck. Indeed, novice hunters may think that we are talking of mallard ducks, of which the drake also has a (much more distinctive) ring around it's neck - but not so - ring necks are their own specie! 

Some people with ringneck savvy will set a decoy spread out off a point, but these places are nearly always in relatively open water for ringneck shooting; when these birds are on migration. They will, like any duck, seek calm waters of bays and inland marshes if the weather is particularly nasty. 

Over the years, I've had good harvests of ringneck ducks, but for the most part, these 'good' harvests have come from remote ponds/beaver ponds in the Central Ontario region of pre-Cambrian shield, such as the Muskoka and Haliburton areas, extending up to Sudbury. I've only shot the occasional ringneck duck in the southern Ontario area, even in one of North America's premier waterfowling places, that of Long Point Bay.