What do these birds do that increases the fish population?

The colors of a butterfly's wings are caused by tiny scales. Do they all produce colors in the same way?

Genetic research suggests that this insect is neither a butterfly or a moth. What is it?

I found this on the beach in St. Augustine, Florida. The sand grains should give you an idea of size. What is it?

This is a Pitcher Plant. The leaves form long, hollow tubes, that bend over at the top to form insect traps. Why do the insects go in, and why does the plant want the insects to go in?