Animals - Amphibians

Newts, salamanders, frogs, toads and caecilians 蚯蚓.

• Young: have gills, which take oxygen from water
• Adult:
  • some live in water: retain their gills
  • some live on land:
    • some develop air-breathing lungs
    • some do not develop lungs and breath through skins instead

Species:

• Salamanders / newts: most have 4 legs; begin life as legless, water-dwelling larvae with a finlike tail.