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...
The young leave the nest after 14 to 16 days and continue to be cared for by the parents for up to four weeks. Robins have two and sometimes three clutches of eggs each year. Nests may be used for multiple clutches; first-clutch nests may be built on top of nests from the previous year. Mortality Robins have a high mortality rate, with up to 80 percent of the young dying each year. Tree squirrels, chipmunks, raccoons, magpies, crows, ravens, and jays eat robin eggs and nestlings. In winter roosting areas, great horned and barred owls take a toll on adult robins.