 This date of hatching is very important, because if they hatch as little as 5 days too early, they will starve to death (Visser & Holleman 2001).Also, if they hatch two weeks too late, the leaves of the oak tree that they so desperately rely on will have achieved tannin concentrations so high that it will not properly nourish the animals (Visser & Holleman 2001).This may seem like a trivial difference, but it will draw out the animals’ duration of which it is forced to feed and leaves it susceptible to further predation and parasitization risk.