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...
You will also have more success in your backyard or garden if you are feeding the birds what they like. Natural foods that birds eat include insects, worms, berries, fruit, flower nectar, nuts, seeds, tree sap, buds of trees and shrubs, fish, small animals, other birds, and eggs.They even scavenge dead animals. You can get a clue what a bird eats by the type of beak or bill the bird has.or a look at different types of bird beak see Anatomy. Other factors that determine a bird s diet include flight habits, sight, and hearing. For example birds like the swallow that feed while flying, rely mostly on insects for food. The eyesight of eagles, and hawks lets them see prey from great distances.