Here are your clues about whether your turtle is a red-eared slider – does it slide off of rocks into the water when you get too close and does it have red where you’d expect it to have ears, as shown? Well then, you’ve got yourself an exotic, invasive animule that doesn’t belong in Golden Gate Park.
The best place to see these critters is Golden Gate Park – here’s one from Stow Lake.
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Bad turtle! That’s a bad turtle, go away!