In Aneides aeneus eggs are suspended by a pedicel to a cave or crevice roof which is moist or has high humidity and a cool atmosphere. Other species deposit their eggs deep within rotting logs, in moist tree holes or underground within hollows under tree roots. These may or not be suspended by a pedicel. The eggs are between 3 and 7mm and white to white-yellow in colour. Number of eggs ranges from just 3 - 4 in A.hardii to 22 in A.aeneus .
Larval development takes place entirely within the egg shell.
Miniature replicas of the parents hatch out after 50 - 90 days. Juvenile coloration is different to adults in West Coast species. Rearing such small creature requires patience and care. Handling of arboreal salamanders must be kept to a minimum. The skin is rather delicate and can be easily damaged.