Scarborough's a big place... where abouts in Scarberia? What's you mode of transportation?
This is actually from the Birding Links at the top of the page, under Toronto Ornithological Club and Hotspots http://www.torontobirding.ca/hotspots/descriptions.php At this time of the year, the Bluffs can be nice for waterfowl if there's isn't too much of a crowd around. Lynde Shores, Cranberrry Marsh and Thicksons Woods are good as well, but a bit further out.