Are red ladybugs piosonous

There are hundreds or thousands of kinds of ants called red ants, and some of them contain more poisons and worse poisons than others. Most things are a little poisonous, sometimes more than a little, for example cigarettes. Some of the kinds of beans we eat are so poisonous that when rats ate them uncooked, they got ill and in a couple of weeks they died. Other kinds would not kill anybody even if we ate them raw, but they still do contain a little poison. It is like that with ants. Most ants contain at least a little formic acid, which is nasty, and rather poisonous, while some kinds are nearly one third formic acid. Other kinds of ants contain far more dangerous poisons; the reason that poison-arrow frogs are poisonous, is the ants that they eat; if you take some of the tadpoles and raise them without poisonous food like the kinds of ants they eat, they grow up without producing any arrow poison.

So, you could argue that red ants are poisonous, and so are black ants, but they are not generally so poisonous that we are more interested in their poison than in the way they can bite and sting.

And by the way, the reason that ant stings hurt is that they inject poison.