The wild boar.
It doesn't look dangerous; it has no claws and isn't a predator, but it is dangerous indeed. Wild boars are known to attack anyone who poses a threat to their young, and a large male can weigh up to 100 kg, much more than a domestic pig. Imagine walking through the woods and finding yourself facing a beast like this, charging at you like a tank, breaking your legs on impact.
The moose.
This animal stands 2.5 meters tall at the withers (a horse reaches 1.8 meters), and if you include its head and horns, it easily reaches 3 meters. It's generally a gentle and shy giant, but during mating season, everything changes: during this time, it doesn't care about anyone, be it a rival, a deer, or a human. In Finland and Sweden, where hunting is permitted, attacks on humans are not uncommon, with all the attendant consequences. The snapping turtle.
This alien species has been present in Italy and France for years, thanks to idiots who buy them when they are small and then get rid of them when they become too large for terrariums. It is an aquatic species and eats everything: fish, amphibians, crustaceans, and other reptiles, even birds and small mammals, not to mention carrion and algae. It is generally a small species, but can weigh over 20 kg, and as its name suggests, once it grabs prey, it won't let go. It is very aggressive out of water, and its bite can break leg bones and inflict serious injuries on a human.