You can use this chart to make substitutions for different types of eggs. Also take into account that eggs such as duck eggs are often richer and more flavorful than chicken eggs.
1 ostrich egg equals 18–24 chicken eggs
1 emu egg equals 10–12 chicken eggs
1 goose egg equals 4 chicken eggs
1 turkey egg equals 2 chicken eggs
1 duck egg equals 2 chicken eggs
3 quail eggs equal 1 chicken egg