Because of the mix of different habitats and the proximity to the river this location offers a great mix of different species and can turn out some quite intersting birds, in partiicular during the winter as other water sources freeze up. 

The park north of Hazlitt and south of Dufferin has a mix of spruce trees which in strong crop years can be good for winter finches including both crossbills and occasional roosting Northern Saw-whet Owls.  

The river below the London St Dam has strong current and stays open most of the year and a number of seeps/springs provide a water source for interesting overwintering sparrows and wrens. During the summer the long views from the dirt footpath overlooking the river is a good vantage for raptors/herons/kingfisher and flycatchers either feeding in the river below or perched in the top os the trees (which you view from above) 

In summer the small cattail marsh near Turtle Island provides a mix of marsh birds despite being fairly small and is one of the more regular locations in the county for Black-crowned Night-heron and the mature mixed poplar stand is good for a range of woodpecker year round.

Along the trail there are a number of homes with birdfeeders which keeps the overall numbers up.

Notable sightings include Black-crowned Night-heron, Northern Mockingbird, Carolina Wren, and Blue-gray Gnatcatcher.

This point covers the trail from Douro St to Parkhill Rd, there is the primary paved trail that runs along the stretch which can be quite busy, but there are seasonal footpaths that run along the river and loop around Turtle island which are all very productive.  Stay clear of the area immediately below the London Street Dam (well marked) due to fluctuating water conditions, however the trail further downstream along the river can be very productive.  This strech of path can get treacherous/slippery in the winter so cleats can sometimes be advisable.

The "triangle" of main trails are all paved and accessible. There are many smaller "seasonal" footpaths to explore the area.