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.
Anna's Hummingbird wings beat about 40-50 times per second in normal flight. 30% of a hummingbird's weight consists of flight muscles. Hummingbirds fly about 25mph in normal flight and up to 40mph in a courtship dive. The heart beats about 250 times per minute while at rest, about 1,220 per minute while flying, but slows to 50 beats per minute at night (this is called torpor).