[Strawberry12]

You probably will have to handle a snail eventually, but it shouldn't be a common thing, because in a 5 gallon that's filtered you shouldn't have to do 100% WCs.

it depends on the type of snail you get with regards to reproduction. Some snails like nerites only reproduce in brackish water, so even if you get two, you won't wind up with more.

Don't put snails outside, in some areas of the country they can survive outside and become an invasive species. I usually just crush the baby snails against the side of the tank and my fish eats them.

And I suppose as long as the bird is caged and there's a lid on the tank there shouldn't be an issue? I don't have any experience in this, however.