This early in May it is probably either a Hermit thrush or a Veery. The Hermit has a rusty-coloured rump and tail while the Veery is kind of rusty on the back as well. I heard a Veery today in the woodlot here in western Pickering right next to the Rouge Park. I also heard a wren in the backyard while making dinner. My guess is that it was a House wren. I wonder if I'll hear it again tomorrow.