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.
A hummingbird flies very differently from other birds, who tend to use their wings to flap or soar. A hummingbird, however, flies by moving its wings in a figure-8 type shape, allowing it to move up, down, side to side, and even backward! Hummingbirds also flap their wings famously fast â enough that they even sometimes buzz! Hummingbirds flap their wings quickly because it helps them to hover, which lets them move from flower to flower and eat up all the delicious nectar they need !