Put it under a lamp any time possible. Especially when it is asleep
It must be really hot, you may put the egg under 2 soft pillows, or cover it with a handkerchief and put it under a lamp.
With an incubator or with the mother, Keep the temperature at around 75 - 100 degrees
An incubator.
Penguin baby eggs are kept warm by the father while the mother looks more food
What You Need to Know About Having Birds as Pets
How to Choose the Right Bird Feeder
How to Feed Birds in the Fall
How to Attract and Feed Birds