How does direct development change the life cycle of some amphibians?

Direct development significantly alters the life cycle of amphibians by eliminating the free-swimming larval stage. In typical amphibian life cycles, eggs are laid in water and hatch into larvae (such as tadpoles) that must independently forage and survive before undergoing metamorphosis into adults.123

In contrast, species that exhibit direct development undergo their entire embryonic growth within the egg membrane. This evolutionary adaptation allows the young to emerge as miniature versions of the adult body form, effectively severing the species' reliance on aquatic environments for the early stages of development. This process occurs across various groups, including many anurans, lungless salamanders, and some caecilians. By bypassing the vulnerable larval phase, these animals can complete their life cycles in diverse terrestrial or arboreal habitats.123