There are two types of atomic bonds-ionic bonds and covalent bonds. They differ in their structure and properties. Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation. Relatively high energies are required to break them (50â-â200 kcal/mol).
Hummingbirds fly by day when nectar sources such as flowers are more abundant. Flying low allows the birds to see, and stop at, food supplies along the way. They are also experts at using tail winds to help reach their destination faster and by consuming less energy and body fat. Research indicates a hummingbird can travel as much as 23 miles in one day.
You might as well enjoy their visits on their way. I always keep my feeders up for a few weeks after I stop seeing hummingbirds in the fall. I continue to change the syrup every couple of jays, to keep the feeder clean and free from mold and fermentation. Sometimes a late hummingbird straggles by long after all the others have gone. This might be a young bird that hatched late in the season and that wasn't ready to migrate when the others left.