Reply #4: I have a couple of pairs of medium sized ones hanging around the yard every year

[NNN0LHI]

They look identical except for the color. On pair is solid white the other is solid yellow. They follow their mates around by smell is my guess. Because they become separated by sight but always end up making a bee line back near each other.

Seems like one leads and one kind of follows?

Here is my question. They seem invisible to birds and other predators? When I cut my lawn I have birds following me to pick off the moths that fly up where I have just cut. The birds fight over them. But these white and yellow butterflies can fly around my yard right past the birds all day long unmolested? Why is that if you know? Is it the color? Or perhaps the way they fly which seems very jittery and I am guessing that may do something to the birds sense of vision?

Whatever it is they are always here every summer. All summer long. They love the sprinkler.

If you know why do the birds not eat them? And they are interesting to watch.

Don