Spittlebugs feed on plant sap and then excrete bubbly foam to create a protective fortress around themselves. Later, they emerge as adult froghoppers.
ScienceTake How to Swim in Sand - The New York Times
Spittlebugs: Nature's Meringue Makers
The Power of Frog Spit - The New York Times
How the Spittlebug Builds Its Bubbly Fortress (NYT)
Small Brain, Big Smarts - The New York Times
ScienceTake Zombie Spiders - The New York Times
How the Spittlebug Builds Its Bubbly Fortress - The New York Times
How a Vortex Helps Dandelions Fly - The New York Times
Maggot Mystery - The New York Times
Ant Obstacle Course - The New York Times
Wolves Beat Dogs in Teamwork Test - The New York Times
Secrets of Velvet Worm Slime - The New York Times
ScienceTake: War of the Ants - The New York Times