We hit up the Toronto Zoo with the family this weekend.
If walking is your thing then I would highly recommend checking out the zoo.  Lots to see and miles to trek but its totally worth it.  I went with full intent of getting piles and piles of pictures but most of the animals had different plans.  If they weren’t sleeping, they were hiding in their cubby holes or out in the bush.  Even with a 75-300mm lens I didn’t get all the shots I thought I would.

Also, keep in mind, if you are planning a trip to the Toronto Zoo especially for photos you will be shooting through a lot of chicken wire, fencing and glass.  It’s great for safety but stinks if you’re there for pictures.