A snake eats the eggs in a birds nest. Later that day, a hawk swoops down and eats the snake. Approximately what percentage of the energy in the eggs was transferred to the hawk?

The answer is 1%

This would be an example of an energy pyramid. In an energy pyramid, the next trophic level gets only 10% of the energy from the level below it. In this example, lets say that there is 100 energy in the eggs. Then, 10% of that goes to the snake, so the snake gets 10. Lastly, the hawk eats the snake, so the hawk gets 1.