Why is the energy less in the hedgehog population than the slug population

The slugs are less noticeable, and therefore, predators, don"t spot them, in which even if they have a main predator, it would be quite difficult to spot. In which on the other hand for the hedgehogs, they are bigger and easier to find. And they have more meat on them then the slugs, so Predators would eat them before the slugs.
This is what I think. I hope this helps please let me know if you need anymore help.

Interspecies hybridization

Explanation:

Differences in beak shapes tell us that all the finches eat the same type of food. Different finch beak shapes are evidence that all Galapagos finches shared a common ancestor a long time ago. Different finch beak shapes are evidence that over time, finch species adapted to different food sources on the islands.

Changes in the size and form of the beak have enabled different species to utilize different food resources such us insects, seeds, nectar from cactus flowers as well as blood from iguanas.