https://phys.org/news/2018-07-ant-world-worker-sizes-superior.html

Researchers at Arizona State University discovered that ant colonies with a mix of large and small workers build better nests than colonies with only small or large workers. Mixed-size groups built longer nests, excavated more sand and produced more architecturally complex nests than single-size worker groups.

Building a new home quickly has a lot of advantages, said Christina Kwapich, lead author of a new study on the subject.