Some of Earth’s creatures are extreme workers. Copella arnoldi fish (splash tetra) leap from the Amazon River to lay their eggs on leaves. Leafcutter ants tirelessly drag leaf bits to their colony to create mulch that grows food fungus. The male bower birds build complex, decorated structures to attract mates. African hunting dogs catch prey using teamwork, beavers engineer large dams to create ponds, and honeybees work 24/7 gathering pollen and nectar and caring for the hive’s queen.