Rondeau Provincial Park, Ontario, Canada, Jan 5, 2019.
We have a large number of nuthatches coming into the feeders right now. Not sure how many as the bounce from feeder to hedge etc.
We also have at least four titmice and a bunch of chickadees.
We often see 4 at a time.
In winter, White-breasted Nuthatches join foraging flocks led by chickadees or titmice, perhaps partly because it makes food easier to find and partly because more birds can keep an eye out for predators. One study found that when titmice were removed from a flock, nuthatches were more wary and less willing to visit exposed bird feeders.
source - https://www.allaboutbirds.org/guide/White-breasted_Nuthatch