Across 350+ million years, amphibians have remained almost exclusively predators: insectivores and small carnivores.
Amphibian Evolution
Long-Term Memory Evolves: Tiktaalik
375 Mya
Complex Brains; Long-Term Memory; Simple Sentience.
Land Hearing Emerges: Amphibians
370 Mya
Land Hearing Emerges; Yet Larger Brains.