Hi
@SwampDonkey
It’s going to be a great trip!
I’d personally recommend the Toronto Zoo, Ripley’s Aquarium, African Lion Safari & Safari Niagara as places well worth your visit; though they can all get pricey if you’re doing a lot at each.
The Toronto Zoo & Ripley’s Aquarium of Canada are truly impressive facilities. You’ll have a great time at both!
TIPS: Do the Aquarium on a day you visit the CN Tower, a Jays game, a concert at Scotiabank Arena or Rogers Centre, or if you’re just downtown in general. The aquarium doesn’t take too long, so it’s nice to break up a day of sightseeing. As for the zoo, it can take some time to get to from downtown but it’s well worth it! For parking you need to purchase a card to insert into a machine in order to leave, so make sure to grab one before you leave or when you enter. I’d highly recommend riding the zoomobile, as you not only get to go through the Eurasia drive-through with Asian Wild Horses and Yaks, you also have a chance to see some phase out species like Himalayan Tahr, Wattled Crane and possibly even a Lion-Tailed Macaque (though they are on their last legs).
African Lion Safari and Safari Niagara are a tier or two below the former two institutions, but still decent in many respects, especially when it comes to species to species not seen elsewhere in Canada as
@TZFan mentioned. The African Wild Dogs, African Leopard and Musk Ox are especially cool at Safari Niagara, and the bird collection along with the elephant herd are cool to see at ALS.
TIPS: It’s good that you plan to be at Safari Niagara for a good chunk of the day. I thought I’d be there for 2 hours and it took me 5, but I took my time appreciating all of the unique species. Don’t miss all of the forest trails featuring an array of predators - albeit in terrible conditions according to me. Neither of these places would unanimously feature in a Canadian Top 10 list, but they make for a fun day.
Finally, Reptilia.
If you’re visiting Canada’s Wonderland or Vaughan Mills then it’s a neat place to stop in to see, but I wouldn’t go out of my way to see it. It took me 30 minutes to see, and I was left feeling a little bit sad for some of the reptiles, especially two fully grown Nile crocodiles.
Let us know if you have any other questions! Happy to help!