Activation energy is the amount of energy required to initiate a chemical reaction. The activation energy can be determined from reaction rate constants at different temperatures by the equation. ln(k 2 /k 1) = E a /R x (1/T 1 - 1/T 2).
Robins also eat other small insects, berries, fallen fruits, and especially Rosaceae fruit in the fall and winter. Robins cannot digest hard fruits or grains, so they stick to soft fruits and organisms with softer skeletons (Howell, 1942). http://www.bio.davidson.edu/people/vecas...
Birds of prey are not only defined by their physical characteristics, but also by their carnivorous diets. While it is widely assumed that the primary prey for raptors is small mammals, these birds actually have a varied diet that can include many different types of game. So what do hawks and other birds of prey eat? What Birds of Prey Eat. Different types of birds of prey eat a wide range of different animals. In general, the larger the bird the larger the prey, but many medium and large raptors will also choose easier, smaller meals. The most common prey of raptors includes: