What Do Emu Eggs Need to Hatch? Alwyn Wils is a bird carer who often rescues abandoned eggs. Emu eggs are bigger and have harder shells than other bird eggs, making them harder to hatch. But Alwyn knows the special conditions needed to hatch emu eggs. Emu eggs are bigger and heavier than other bird eggs, weighing about 600 grams and 13 centimeters long. Their shells are also harder and thicker, making them stronger but harder to hatch. Did you know that emu eggs can last longer than other bird eggs? They can last about 50 days, making them stronger than other eggs. To hatch emu eggs, special conditions are needed. The temperature must be 37.5 degrees Celsius, the humidity must be between 50-60%, and the eggs must be kept still in an incubator. Alwyn puts the eggs in the incubator and waits about 56 days for them to hatch. After 56 days, the emu eggs hatch, and Alwyn takes care of the baby emus. They are weak at first, but with Alwyn's care, they get stronger quickly.