For the summer at least, you could try putting up a hummingbird feeder. Ruby throated hummingbirds are found in Ontario during the summer months. Those are one of the least messy birds to feed, in my opinion. (Edit: I looked and saw that humming birds may not work, I’ll keep this here though because maybe it still will be useful) If you really need to keep any mess at all from collecting and are using a messy seed (I swear by black oil sunflower seeds to attract the widest variety of birds) then maybe placing a large tray or something with a lipped edge under the feeder. To prevent rodents, I use Cayenne pepper. Birds can’t taste it (Their sense of taste is pretty poor) and rodents don’t like it. Consider using a feeder with small holes/mesh, or one of the ones designed to keep noisy and loud birds away (I love corvids, but they are quite noisy!) some or all of these steps should be enough. Good luck with your bird feeders, I think it’s a great idea!
(Edit 2: Oh, this is from April. I need to check the dates on these threads :-P )