For many birders, myself included, it seems that the quality of birding for May and the end of April is defined by what warblers are seen. And as a result, the most exciting birds I've seen recently have been warblers. In addition to the Yellow-Rumped, I've found two other species of warblers around:
In direct contrast to the preceding species, the Palm Warbler is rather poorly named. Although they may use palms to some extent in winter, there are not very many palm trees in the boreal bogs where they breed! I saw my first two Palm Warblers for the year today.
There are of course other interesting birds arriving from the south. Swallows are increasingly obvious and I spent some time watching a group of Northern Rough-winged, Barn, Tree and Cliff Swallows as well as Chimney Swifts catching midges from the dense swarms that made biking so unpleasant at times today. This Northern Rough-winged Swallow landed to preen for the while in the middle of a dense cloud of the flies.
As the warmer temperatures arrive ephemeral forest wildflowers are racing to reproduce before they are plunged into deep shade by the maples and oaks overhead.
Yellow Trout Lilies carpet the forest floor, but will be gone without a trace not long after the trees leaf out.
Unfortunately, all these flowers are close to expanding patches of invasive Garlic Mustard, and will likely be gone within five or ten years.
Just so I don't have to end on that unhappy note, here's a nice healthy-looking fox from Guelph.