Some colonizers are ants, which are small insects that live in colonies and work together to build their homes. They are known for their ability to carry heavy objects many times their own weight, and they are also able to communicate with each other through chemical signals. Ants have been around for millions of years and are found on every continent except Antarctica. Colonies of ants can range from a few dozen to millions of individuals, and they are an important part of the ecosystem, helping to break down organic matter and disperse seeds.